KEPTILIA. 63 



No. 231. Pliosaurus braehydeirus, Owen. 



Paddle. This big-head- 

 ed, short-necked, amphicoe- 

 lian Reptile was more closely 

 lacertilian than the Ichthy- 

 osaurus. With the excep- 

 tion of the teeth, which are 

 thicker and stronger, of the 

 vertebra of the neck, which 

 like those of tlielchthyosaurus 

 are compressed, and of the 

 more massive proportions of 

 the jaws and paddle-bones, the 

 skeleton of the Pliosaurus 

 resembles that of the Plesio- 

 saurus. Some individuals 

 attained the length of more 

 than forty feet. The huge 

 paddle was found in the Kim- 

 meridgian bed (Upper Oolite) 

 near Dorchester, England- 

 and is in the Museum of that 

 city.— Size, 7 ft. 2 in. x 1 ft. 9 

 in. Price, $18.00. 



No. 232. Pliosaurus grandis, Owen. 



Skull and Lower Jaw. This species very closely resembles the preced- 

 ing. It was at first regarded by Owen as a Plesiosaurus. This specimen, the 

 most interesting relic of the Pliosaurus yet discovered, was found in the Kim- 

 meridge Clay (Upper Oolite) of Dorsetshire, England, and is now in the British 

 Museum. The skull, which is over four and a half feet in length, is perfect in all 

 except the posterior region ; the lower jaw measures 5 ft. 7 in. by 2 ft. 



Price, $40.00. 



No. 233. Pliosaurus grandis, Owen. 



Tooth. This is the largest reptilian tooth among either actual or extinct 

 forms, and rivals in size the teeth of the full grown Sperm-whale. This fine typi- 

 cal specimen is from the same locahty and Museum as the preceding. 



Size, 12 x 3. Price, $1.50. 



No. 234. Pistosaurus grandsevus, Meyer. 



Skull. In this saurian the facial part of the skull contracts abruptly in front 



