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The Ornithosauria: An elementary study of the bones of Pterodactyles made from fossil remains found in the Cambridge Upper Greensand, and arranged in the Woodwardian Museum of the University of CambridgeSeeley, H. G. (Harry Govier)

Science

The Ornithosauria: An elementary study of the bones of Pterodactyles made from fossil remains found in the Cambridge Upper Greensand, and arranged in the Woodwardian Museum of the University of Cambridge

Name: The Ornithosauria: An elementary study of the bones of Pterodactyles made from fossil remains found in the Cambridge Upper Greensand, and arranged in the Woodwardian Museum of the University of Cambridge
Author: Seeley, H. G. (Harry Govier)

Seeley, H. G. (Harry Govier)

Pterosauria

In this specimen the articulation, which is broken, is about 3/4 of an
inch wide, 3/8 of an inch thick. The remaining piece of the quadrate is
an inch long. The quadrato-jugal is an inch and 3/16 high, and between
its broken ends 1-3/4 inch long. It is thick and strong where joining
the quadrate, but the rest of the bone is about an 1/8th of an inch
thick.

The quadrate bone is Avian in possessing a pneumatic foramen, and Avian
in the form of so much of the distal end as is preserved, and in the
articulation for the lower jaw. The process which it sends inward on
the inside is probably for the pterygoid bone, after the manner of
Birds. Before anchylosis with the quadrato-jugal bone set in, as may
be seen in =J=._c_.11.4, the union was made by a hemispherical knob on
the outside of the quadrate, as in _Gallus domesticus_. The squamose
quadrato-jugal is a distinctive character.


  ?PTERYGOID END OF PALATINE BONE.

  Pl. 12.

  Case. Comp. Tablet. Specimen.
   =J=   _c_    14      1-2

This determination is conjectural. Its form is such as would make it
probable that it is part of the head. A more perfect specimen is seen
in =J=._c_.1.2.7.

The best specimen is a compressed sub-quadrate fragment of bone
terminating at one end in a long reniform articular surface, and at
the other end in a fracture where the bone is rapidly thickening. A
side, regarded as the outer one, is flattened, being slightly concave
in length, and slightly convex from side to side. The form of the
inner side of the bone is determined by the inward curve of the thick
part of the articular surface, which sends a rounded ridge obliquely
on to the side, so that while it is concave from side to side at the
articulation, at the fracture it is convex from side to side. All the
specimens are large, the articulation being not less than an inch long.


  PREMAXILLARY BONES

  Pl. 12.

appear to be developed as in birds. An account of their structure will
be found in the notes on the species, page 112.

                   ------------

  OS ARTICULARE AND PROXIMAL END OF LOWER JAW.

  Pl. 12.

  Case. Comp. Tablet. Specimen.
   =J=   _c_    12      1-6

Public-domain text, read in full here on John Shaqi.

Opening the text

Science

The Ornithosauria: An elementary study of the bones of Pterodactyles made from fossil remains found in the Cambridge Upper Greensand, and arranged in the Woodwardian Museum of the University of Cambridge

Seeley, H. G. (Harry Govier)

Pterosauria

In this specimen the articulation, which is broken, is about 3/4 of an
inch wide, 3/8 of an inch thick. The remaining piece of the quadrate is
an inch long. The quadrato-jugal is an inch and 3/16 high, and between
its broken ends 1-3/4 inch long. It is thick and strong where joining
the quadrate, but the rest of the bone is about an 1/8th of an inch
thick.

The quadrate bone is Avian in possessing a pneumatic foramen, and Avian
in the form of so much of the distal end as is preserved, and in the
articulation for the lower jaw. The process which it sends inward on
the inside is probably for the pterygoid bone, after the manner of
Birds. Before anchylosis with the quadrato-jugal bone set in, as may
be seen in =J=._c_.11.4, the union was made by a hemispherical knob on
the outside of the quadrate, as in _Gallus domesticus_. The squamose
quadrato-jugal is a distinctive character.


  ?PTERYGOID END OF PALATINE BONE.

  Pl. 12.

  Case. Comp. Tablet. Specimen.
   =J=   _c_    14      1-2

This determination is conjectural. Its form is such as would make it
probable that it is part of the head. A more perfect specimen is seen
in =J=._c_.1.2.7.

The best specimen is a compressed sub-quadrate fragment of bone
terminating at one end in a long reniform articular surface, and at
the other end in a fracture where the bone is rapidly thickening. A
side, regarded as the outer one, is flattened, being slightly concave
in length, and slightly convex from side to side. The form of the
inner side of the bone is determined by the inward curve of the thick
part of the articular surface, which sends a rounded ridge obliquely
on to the side, so that while it is concave from side to side at the
articulation, at the fracture it is convex from side to side. All the
specimens are large, the articulation being not less than an inch long.


  PREMAXILLARY BONES

  Pl. 12.

appear to be developed as in birds. An account of their structure will
be found in the notes on the species, page 112.

                   ------------

  OS ARTICULARE AND PROXIMAL END OF LOWER JAW.

  Pl. 12.

  Case. Comp. Tablet. Specimen.
   =J=   _c_    12      1-6

Public-domain text, read in full here on John Shaqi.

The Ornithosauria: An elementary study of the bones of Pterodactyles made from fossil remains found in the Cambridge Upper Greensand, and arranged in the Woodwardian Museum of the University of Cambridge

The Ornithosauria: An elementary study of the bones of Pterodactyles made from fossil remains found in the Cambridge Upper Greensand, and arranged in the Woodwardian Museum of the University of Cambridge

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