240 CASE. [Vol. II. 



condyle upon the sides than in the middle, indicating a rather 

 bipartite condition, such as is found to a greater degree in the 

 GompJiodontia. 



The vertebrae are all deeply biconcave, and there are wide 

 spaces between the lower edges of adjacent vertebrae, which 

 indicate the presence of intercentra. Between the seventh and 

 eighth vertebrae there is a small bone which appears to be an 

 intercentrum. The most striking thing about the vertebrae is 

 their similarity to the vertebrae of Pareiasanrns. The neural 

 arches are broad and f^at, with rather swollen sides and very 

 prominent anterior and posterior zygapophyses, whose faces 

 look straight up and down. The spinous processes are short 

 and stout, and seem to have been attached 

 to some dermal ossification ; in the ante- 

 rior part of the column the processes are 

 bifurcate. Fig. 3 will show the general 

 appearance of a vertebra from the poste- 

 FiG. 3. — A posterior dorsal rior part of thc scrics. The most anterior 



vertebra (natural size). r ,i . i • r i. i i- 



of the connected series 01 vertebrae lies 

 immediately above the anterior ends of the coracoids ; it has 

 stout transverse processes that stand out at a right angle 

 from the anterior part of the centrum and underlie for the 

 most part the anterior zygapophyses ; they are about as 

 lone: as one-half the centrum. Attached to the transverse 

 process is a long rib, wide at the two extremities and nar- 

 rowed into a rather angular shaft in the middle portion ; the 

 proximal end is attached by the upper part to the transverse 

 process, and by the lower to the intercentrum (the tubercula 

 and capitula are not distinct). The distal extremity of the 

 rib is wide and spatuliform ; the whole rib is bent upon itself 

 so that the two ends are directed at right angles to each 

 other. The second vertebra bears a pair of ribs that differ 

 from the first pair in that they are straight and longer ; they 

 are expanded proximally and distally. The transverse processes 

 of the vertebrae grow smaller, until the last can be detected as 

 a small tuberosity upon the ninth from the first rib-bearing one ; 

 it is probable from the size and rate of diminution that the last 

 trace disappeared upon the eleventh ; this would leave five verte- 



