92 



short. The f^tcets for the ribs are dev^eloped in the usual 

 place. The neural arch is rather high, and forms a small, 

 narrow canal ; the proportions of the neurapophyses and 

 neural spines are about as in Alligattn' iiiississippiciisis, but the 

 z3'gapophyses are not so prominent. 



The dorsals show a considerable increase in size over the 

 cervicals ; the centra become elongate, and the articular 

 cups shallower and transversely oval. Several of the anterior 

 vertebrae retain large hypapophyses. In the dorsal region 

 the diapophyses are developed from the neurapophyses alone, 

 and at a considerable height above the neuro-central suture ; 

 they are long and depressed. The zygapophyses and neural 

 spines present no peculiarities of structure. 



In the hivihar region the vertebrae regain their cylindri- 

 cal form, and become still more elongate ; but the cups are 

 comparatively shallow and the heads low ; there is no dis- 

 tinct shoulder. The neural canal is small, with low, broad 

 neurapophyses, from which are developed very broad and 

 depressed diapophyses, which project outwards in a horizon- 

 tal plane. The neural spines are thick, and broad antero-pos- 

 teriorly, but are so broken that their height cannot be de- 

 termined. 



In both dorsal and lumbar region the neurapophyses are 

 deeply notched on their posterior edges, and close to the 

 neuro-central sutures, for the passsage of the spinal nerves. 



The ilhim is very high compared with most crocodiles ; 

 its vertical diameter is considerably more than half of the 

 antero-posterior diameter. The construction of the bone is 

 very much like that in the modern Crocodilia ; but the suprailiac 

 border is more regular, and the anterior tuberosity is not so 

 thick or so much everted as in these forms. The acetabu- 

 Ir.m is small, shallow, directed downwards and outwards, and 

 sif.Licted considerably forward of the median line. The iliac 

 surface is smooth, but very irregular, being very deeply con- 

 cave above the acetabulum, and convex behind it. The sacral 

 surface is rugose, rises above the sacrum, and shows attach- 

 ments for two sacral vertebras. Thus the construction of the 

 entire pelvis shows but very little variation Irom the modern 

 type. 



