62 VEETEBEA.TA. 



No. 228. PlesiOSauniS Cramptoni, Carte and Baily. 



Skeleton, on slab. This splendid Plesiosanrus — the largest ever discovered, 

 was found in 1848 in the Lias, near Whitby, England, and adorns the Natural 

 History Museum of the Royal Dublin Society. It lies in a prone position, resting 

 upon the ventral surface with the head and neck slightly inclined to the right. 

 The skull is almost entirely free from the matrix, and is very perfect, excepting 

 the zygomas. In contour it is crocodilo-lacertian ; it is somewhat flattened in pro- 

 portion to its length and width, tapering from the parietal crest to the snout. 

 The orbits are obliquely placed and subtriangular in shape : the greatest diame- 

 ter is five and a half inches. The nasal apertures are ovoid, and are situated j ust 

 in front of the orbits. The anterior portion of the cranium is elongated and 

 rounded at the muzzle. The lower jaw is extremely massive, its greatest length 

 being three feet six inches, and its greatest depth six inches. The teeth number 

 over a hundred. They resemble those of the Crocodile in their irregular arrange- 

 ment, and iu being implanted in distinct cavities. The large teeth are situated in 

 front. The length of the head is to that of the neck as five to eight, and to that 

 of the whole skeleton as one to six. The vertebral column throughout has fallen 

 over towards the right side, presenting a slightly irregular curve, thus exposing 

 in the cervical series a side of the centrums with their large neurapophyses. The 

 cervical vertebra? number twenty-seven. There are thirty dorsals, having a unit- 

 ed length of eight feet. The caudal portion is somewhat dislocated : the cen- 

 trums with their spines and processes are, however, well exhibited. The verte- 

 brae of this region number thirty-four. The ribs are well shown, being nearly in 

 their original position. Excepting the left hind-paddle which is imperfect, the 

 extremities are remarkably preserved. The carpal and tarsal bones are each six 

 in number ; the metacarpals and metatarsals, four. The humerus and femur are 

 each twenty inches long. This cast is in eight pieces. 



Size, 22 ft. 8 in. x 12 ft. 6in. Price, painted, 



No. 229. Plesiosanrus CramptOIli, Carte and Bailey. 



Head, of No. 228. Size, 3 ft. 6 in. x 2 ft. Price, $15.00. 



No. 230. Plesiosanms Cramptoni, Carte and Baily. 



Left Foke-P addle, of No. 228. Size, 5 ft. 4 in. x 14 in. Price, $10.00. 



