18 VERTEBEATA. 



No. 43. Glyptodon Clavipes, Owen. 



Restoration. This 

 cast is a complete resto- 

 --.l^^l? ration of the animal on 

 the scale of about two 

 inches to the foot. 

 Size, 24x11. Price, $12. 



No. 44. Scelidotherium Cuvieri, Owen. 



Skull and Lower Jaw. This Edentate closely resembled the Megatherium, 

 but was inferior in size, and had a more slender head. It is particularly distin- 

 guished for the enormous breadth of its thigh-bone, whence the generic name. 

 This skull and lower jaw were found with remains of the other great terrestrial 

 Sloths in the Pampas of Buenos Ayres (Pleistocene), and are preserved in the 

 British Museum. Size, 18 x 12. Price, $12.00. 



Order 6 — Ruminantia. 



The Ruminants are herbivorous, even-toed, and hoofed. Excepting 

 the Camel tribe and Musk-deer, the males, and sometimes the females, 

 are provided with two horns attached to the os frontis. In the Deer 

 tribe, these horns are of bone, solid, and deciduous ; the rest have 

 hollow, corneous horns. The Camel only, has a pair of upper incisors ; 

 the hornless Ruminants have canines. The crowns of the molars are 

 marked off by two double crescents, whose convexity is turned inwards 

 in the upper and outwards in the lower. The number of dorso-lumbar 

 vertebrae is generally nineteen. The clavicle and third trochanter are 

 wanting. 



The specialized form of hoofed animal with cloven feet and ruminat- 

 ing stomach did not appear till the Miocene Epoch ; but there existed 

 in the Eocene certain even-toed Ungulates, e. g. Anoplotherium, which 

 in several important characters (hornless foreheads, upper incisors and 

 divided cannon-bones) resembled the embryo of Ruminants, and 

 were probably links connecting the true Ruminants with the 

 Hippopotamus and Hog. They all disappeared during the Pliocene. 

 Fossil species of the Camel, Camelopard, Deer and Antelope are found 

 in the Miocene ; the Bovine family first appeared along with the extinct 

 Pachyderms of the older Pliocene ; while the Sheep and Goat have 

 been detected only in caverns and superficial deposits. 



No. 45. Camelus Sivalensis, Falc and Caut. 



Skull. This extinct Camel was related to the existing Bactrian species, but 

 exceeded it by at least one-seventh in height. This fossil skull is in a fine state 



