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3443. Two molars of a Hippopotamus, in polished sections, viz. 



a. A vertical section of the last true molar (m 3) from the right side of the upper jaw. 



b. The corresponding section. 



e. A transverse section of the penultimate molar (m 2) from the left side of the under jaw. 



Presented by Sir Everard Home, Bart., V.P.R.S. 



3444. Five molars of the Hippopotamus, viz. 



a. The first true molar (ml) from the right side of the upper jaw. 

 6. The second true molar (m 2) from the right side of the upper jaw. 

 e. The third true molar (m 3) from the left side of the under jaw. 



d. An incipient molar from the right side of the upper jaw. 



e. An incipient molar from the right side of the upper jaw. 



Hunterian. 



Suborder RUMINANTIA. 



Family Candida. (Camels, Llamas, Vicunas.) 



Genus Camelus. 



3445. The skeleton of the Camel (Camelus bactrianus). 



The vertebral formula is : 7 cervical, 1 2 dorsal, 1 lumbar, and 4 sacral : there are 1 5 caudal 

 vertebrae in the present instance, but some of the terminal ones are wanting. Seven pairs of 

 ribs articulate directly with the sternum, which consists of sis bones, the last being greatly 

 expanded and protuberant below, where it supports the pectoral callosity in the living animal. 

 The cervical region is remarkable for its length and flexuosity, and the vertebrae are peculiar 

 for the absence of the perforation for the vertebral artery in the transverse process, with the 

 exception of the atlas ; that artery, in the succeeding cervicals, enters the back part of the 

 neural canal, and perforates obliquely the fore part of the base of the neurapophysis. The 

 costal part of the transverse process is large and lamelliform in the fourth to the sixth cervical 

 vertebrae inclusive : in the seventh it is a short protuberance. The metapophysial tubercle 

 is developed from the diapophysis in the eleven anterior dorsal vertebrae, and passes upon the 

 zygapophysis in the twelfth, continuing in that position throughout the lumbar series. There 

 are no anapophyses. The spinous process of the first dorsal suddenly exceeds in length that 

 of the last cervical, and increases in length to the third dorsal ; from this to the twelfth dorsal 

 the summits of the spines are on almost the same horizontal line, and are expanded and ob- 

 tuse above, sustaining the substance of the two humps of this species ; the spines of the lumbar 

 vertebrae progressively decrease in length. The diapophyses of the last six lumbar vertebrae 

 are very long ; that of the first lumbar is intermediate in length between the short diapophysis 

 of the twelfth dorsal and the long one of the second lumbar. The spine of the scapula b pro- 

 duced into a short pointed acromion : the coracoid tubercle is large, and grooved below. The 



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