---+----------------------+--------------------+-------------------- 13 | Antorbital foramen | 1 foramen | 1 foramen ---+----------------------+--------------------+-------------------- 14 | Intercellular laminae| None | None ---+----------------------+--------------------+-------------------- 15 | Atlas |Long, |Short, | | no hypophysis | no hypophysis ---+----------------------+--------------------+-------------------- 16 | Axis | Peg like odontoid |Odontoid slightly | | | flattened on top ---+----------------------+--------------------+-------------------- 17 | Cervicals 3-7 | Moderately long | Short ---+----------------------+--------------------+-------------------- 18 | Humerus |Rounded no spur |Flattened distally, | | on deltoid ridge | tiny spur on | | | deltoid ridge ---+----------------------+--------------------+-------------------- 19 | Radius and Ulna | Moderate length | Fairly long | | | ---+----------------------+--------------------+-------------------- 20 | Femur |Rounded, |Rounded, | | Gr. trochanter | Gr. trochanter | | high, | very low, | | 3rd trochanter | no 3rd trochanter ---+----------------------+--------------------+-------------------- 21 | Tibia |Moderate length, |Moderate length, | | fused to fibula | free from fibula | | at upper end | ---+----------------------+--------------------+-------------------- Still other forms like _Amblypoda_ and _Arsinotherium_ have been suggested as having characters in common with _Pyrotherium_, and it is clear that, with such a variety of forms, some of the characters must be parallelisms due to a common adaptation, and only one of these varied groups can be the one to which _Pyrotherium_ is related. For myself, I have made comparisons with the _Amblypoda_ and _Arsinotherium_, and feel that such features as the massive limbs, shape of individual bones, etc., are due simply to the fact that all these are massive animals. In the case of _Arsinotherium_, there are some characters which are also common to hyracoids and elephants, like the position of various basicranial foramena, the prolongation backward of the jugal and the shape of the palatines. My conclusion is that _Pyrotherium_ is related to the proboscideans, and came from the same stock which gave rise to hyracoids, elephants and _Arsinotherium_. I think further that _Pyrotherium_ belongs definitely to the proboscidean line.