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The Beaked Whales of the Family Ziphiidae: An Account of the Beaked Whales of the Family Ziphiidae in the Collection of the United States Museum...True, Frederick W. (Frederick William)

Science

The Beaked Whales of the Family Ziphiidae: An Account of the Beaked Whales of the Family Ziphiidae in the Collection of the United States Museum...

Name: The Beaked Whales of the Family Ziphiidae: An Account of the Beaked Whales of the Family Ziphiidae in the Collection of the United States Museum...
Author: True, Frederick W. (Frederick William)

True, Frederick W. (Frederick William)

Beaked whales

cement layer, from 2 to 5 mm. broad, while the interior of the tooth is
  filled with a white, amorphous, calcareous mass, which is interspersed
  with thin yellowish lamellæ of dentine. Here and there, also, thin
  lamellæ are seen to extend from the outer cement layer into the white,
  amorphous, calcareous mass. The dentine lamellæ appear to be identical
  with what Ray Lankester calls osteodentine. No pulp cavity is visible
  in the root of the tooth.[15]

The dimensions of the Nantucket skull are given in the following table in
comparison with those of seven European skulls of _M. bidens_. Dimensions
of the Annisquam, Massachusetts, skull are also added for purposes of
comparison, although it represents another species (see p. 9).

  _Dimensions of eight skulls of Mesoplodon bidens and one skull of M.
                           densirostris (?)._

  Column headings:
    _M. bidens._
      B: Nantucket, Massachusetts, 1867, M.C.Z., female? adult.[a]
      C: Scotland, 1872, Turner, female young.?
      D: Fæø, Norway, 1895, Grieg, female? young.
      E: Shetland, 1881, Turner, male adult.
      F: Rugsund, Norway, 1901, Grieg, male adult.
      G: Udsire, Norway, 1869, Malm, male (No. 1).
      H: Vanholmen, Sweden, 1881, Malm, male (No. 2).
      I: Landenæs, Norway, 1895, Grieg, male.
    _M. densirostris. (?)_
      J: Annisquam, Massachusetts, 1898, True, female young.


 Measurements.            B       C      D      E    F    G    H      I       J
                        mm.     mm.    mm.    mm.  mm.  mm.  mm.    mm.     mm.
 Total length       [b]765+     749    620  743±  ...  733  740    660  [c]622
 Length of rostrum  [b]483+     489    400    ...  ...  485  500    410  [c]377
 Tip of beak to    [bd]607+     572    ...    ...  ...  582  590    517 [cd]466
   end of
   pterygoid
 Height from            277     241    ...    254  267  272  258    235     248
   vertex to
   pterygoid
 Breadth between     [e]277     286 [f]254    267  292  293  253 [f]260   [278]
   orbits
 Breadth between        289     292    262    292  295  298  270    268     266
   zygomatic
   processes
 Breadth at             184     197    170    184  193  187  170    175   [166]
   maxillary
   notches
 Breadth of beak         42      51     38    ...  ...   36   46  [g]40      38
   at middle
 Depth of beak at        35     ...  [h]31    ...  ...  ...  ...  [h]33      51
   middle
 Greatest breadth       131     127    115    114  116  129  124    122     ...
   of premaxillæ
   proximally
 Greatest breadth       107     102 [h]104    102  108  108  100  [h]76      92
   of premaxillæ
   in front of
   anterior nares
 Greatest breadth        54     ...     53    ...   53   50   50     50      39
   of anterior
   nares
 Length of               90     ...    ...    ...  ...  ...       [h]66      82
   temporal fossæ
 Breadth between        222     ...    ...    ...  ...  ...  ...    ...     208
   temporal fossæ
 Breadth of              50     ...    ...

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The Beaked Whales of the Family Ziphiidae: An Account of the Beaked Whales of the Family Ziphiidae in the Collection of the United States Museum...

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