VOL. XIII.] PHILOSOPHICAL TRANSACTIONS. 675 



molares to the incisores, seemed spongy and carious; and the tusks in this 

 jaw were rotted out; as were one or two of the incisores, which in all were 

 about four. 



There were seven vertebrae of the neck ; which measured in length 44- inches. 

 The first, or atlas, had two broad transverse processes, but no spine. The 

 second had a broad large spine. The third, fourth, fifth, had no spines; the 

 sixth and seventh had large acute ones. There were 19 vertebrae of the back; 

 the spines of the first, second, and third, were about 3 inches long; but they 

 gradually decreased, as they approached the tail. The first vertebra of the os 

 coccygis was 1 inches long ; and though it seemed to be several, yet it was 

 but one bone. There were but 6 vertebrae more, which ran no farther than 

 the extent of the os ischii. There were 14 ribs on each side. The os sterni 

 jetted out about an inch beyond the setting on of the first ribs. The scapula 

 was 5 inches long; the os femoris of the fore foot b\\ the os tibiae of the 

 fore foot about the same length in the whole: but from the juncture with the 

 OS femoris to the os metatarsi it was but 4 inches; for from the juncture 

 with the thigh-bone it jetted out further. The bones of the tarsus were 5 : 

 of the metatarsus 3, about 1 inches long. The bones of the digiti 9 ; there 

 being 3 to each claw, and 3 claws on each fore foot. The os femoris of the 

 hinder foot was almost 6 inches long ; and near its juncture with the os tibise 

 it had a small bone, like the patella in the knee of a man. In the leg were 

 two bones, the focile majus and minus, 54- inches long. But this part in the 

 fore leg was only a single bone; though in a dog, a monkey, and some other 

 animals, there are two bones in the fore-leg likewise. The os calcis was almost 

 2 inches long; and there were 4 other bones of the tarsus or instep. The me- 

 tatarsus or foot was composed of 4 bones, but the two inward much the largest; 

 being 1\ long; there were four digiti, in each three bones; whereof the last 

 was covered with a nail. 



The Explanation of the Figures, 



Plate XXII. Fig. 1, represents the natural shape of this Mexican hog, and 

 the line, a, points to the scent gland, on the hinder part of the back. 



Fig. 2, gives a view of the skeleton, a the fore teeth or incisores; b the 

 tusk ; cc the grinders, or molares ; d the lower jaw; e that part of the lower 

 jaw which was carious ; f the cranium ; g the orbit of the eye^ h the porus 

 auditorius, or passage to the ear ; i the triangular expansion of the cranium 

 backwards ; k the vertebrae of the neck ; 1 1 the vertebrae of the back and loins ; 

 m the vertebrae of the os coccygis; n n the ribs ; o the protuberant bone of the 

 sternum ; p the scapula, or shoulder blade ; q the os ischii ; r r the os femoris, 



4 b2 



