CAUDAL VERTEBRAE OF A REPTILE. 333 
extremities; the visceral aspect is smooth, but gently ridged. The 
spinous processes are almost perfect, and are 15 inches high; but, 
although so large, they bear no resemblance whatever to the extra- 
ordinary bony apophyses of the Hylmosaurus, but rather afford a 
negative proof that those appendages belonged to the back of that 
animal. The transverse processes arc very short. The chet'ron bones 
arc like those of the Iguana; three of them remain almost entire. The 
width (or rather height) of the tail, at this part, must have been, at 
least, 27 inches, and its entire length 22 feet. 
