547 



indicated by their different degrees of attrition. The first true molars have been worn to the 

 roots : the second true molars have had all the enamel abraded from the crown : the pre- 

 molars which are in advance, having come later into place, are less worn ; and the last true 

 molar shows the least amount of abrasion. 



Purchased. 



3273. The cranium of a Sow (Sus Scrofa). Hunterian. 



3274. The left ramus of the lower jaw of a nearly full-grown Sow, showing an 

 extensive and deep ulceration at its outer side. Purchased. 



3275. The left ramus of the lower jaw of another Sow, showing disease and tume- 

 faction at the same part of the jaw. 



Both this and the foregoing specimen were bred in Norfolk. 



Purchased. 



The following, to No. 3291 inclusive, are parts of the same skeleton of a Hog (Sua 

 Scrofd) : 



Hunterian. 



3276. An anterior dorsal vertebra. 



The spinal nerve perforates the base of each neurapophysis horizontally and of each 

 diapophysis vertically. 







3277. An anterior dorsal rib. 



3278. A middle dorsal vertebra. 



It shows the same perforation of the neurapophysis and diapophysis. The metapophysis 

 projects forwards from the fore part of the diapophysis. 



3279. A middle dorsal rib. 3280. A lumbar vertebra. 



3281. The sacrum. 



It includes five anchylosed vertebrae. The articular surfaces for the ilium are vertical. 



3282. The right scapula. 



The spine is bent down, and terminates in an obtuse angle a little nearer the posterior 



4 A2 



