543 



parts of the tranverse processes, and the seventh cervical for the absence of the pleurapophysis 

 and the sudden increase in the length of the neural spine. This is far surpassed by the spines 

 of the anterior dorsal vertebrae ; after which those processes progressively decrease in height 

 to the last three dorsals, where they gain in antero-posterior extent : the verticality of the 

 spine of the eleventh dorsal indicates the centre of motion of the trunk. The dorsal neur- 

 apophyses are directly perforated by the spinal nerves, and a bar of bone connects the end of 

 the diapophysis with the hind part of the centrum, circumscribing a vertical perforation on 

 each side. The metapophysis commences as a tuberosity upon the diapophysis of the middle 

 dorsal vertebrae, projects forwards midway between the dia- and prozyg-apophyses in the tenth, 

 passes upon the prozygapophysis of the eleventh dorsal, and is continued in that position 

 throughout the lumbar series. There are no anapophyses. The spine of the scapula is most 

 developed at its middle, where it is bent back : there is no acromion. The humerus has an 

 intercondyloid vacuity. The medullary artery of the femur enters the fore part of its upper 

 third and the canal slopes downwards. The innermost digit is not developed on either the 

 fore or hind foot : the symmetrical pair, which are most developed and chiefly serviceable in 

 progression, answer to the third and fourth digits of the pentadactyle foot. There is a super- 

 numerary premolar, or retained deciduous tooth, on the left side of the upper jaw in this 

 specimen. 



Presented by Dr. Henderson. 



3249. The skull of an Indian Wild Boar (Sits Scrofa). 



In this is well exemplified the typical dentition of the Diphyodont Mammals, or those that 

 have two sets of teeth. The first premolar of the upper jaw is wedged in between the second 

 premolar and the great canines, whilst its homotype in the lower jaw stands freely in the 

 middle of a wide space between the canines and second premolars. The cranial sutures are 

 obliterated : those of the face show the great extent to which the premaxillaries unite with 

 the elongated nasals. The alveolus of the upturned superior canines supports a strong longi- 

 tudinal ridge at its upper part. The chief difference between the Indian and the European 

 Wild Boars as regards the skull, is shown in the longitudinal outline of the cranium, which is 

 convex in the Indian and concave in the German Wild Boar. The skull is also longer in 

 proportion to its breadth and depth in the Indian species. 



Presented by W. Storey, Esq. 



3250. The skull of an Indian Wild Boar, from Bengal. 



Presented by Dr. Wallich, F.E.8. 



3251. The skull of an Indian Wild Boar, with the dental series complete and the 



prenasal ossicle preserved. 



Presented by Col. Everett, H.E.I.C. 



3252. The skeleton of a Boar (Sus Scrofa). 



In this specimen, which may be of a domesticated race, there are 14 dorsal and 7 lumbar 

 vertebrae. Two centres of motion are indicated by the vertical direction of the neural spines, 

 the one at the third vertebra of the neck, the other at the eleventh vertebra of the back. The 



