39C 



2215. The left scapula. 



The acromion is long and bent downwards ; its inferior process is feebly developed. 



2216. The left humerus. 



The deltoid process is prominent and well-defined, compressed, and bent downwards. 

 There is a minute perforation between the condyles, but none above the inner one. 



2217. The left radius and ulna, with the bones of the left fore-foot. 



The bones of the fore-arm are in contact and closely united, except at the narrow space 

 near their proximal ends. The pollex is represented by its metacarpal bone. 



2218. The bones of the left hind-leg. 



The femur has a third trochanter, with two patellae in front, and two fabellee behind the 

 condyles. There is a small ossification at the anterior end of each semilunar cartilage. The 

 fibula is anchylosed to the tibia at both its extremities. The entocuneiform is long, and 

 applied to the inner side of the base of the second metatarsal, but it supports a short meta- 

 tarsal with the first and ungual phalanx of its proper digit, the hallux. 



2219. The right femur. 



The distal epiphysis is still ununited : the two fabellae remain attached. 



2220. The right tibia and fibula with the small and great patellae, and the two ossi- 

 cula developed in the semilunar cartilages. 



2221. The skeleton of the Short-tailed Field Vole (Arvicola arvalis). 



The vertebral formula is : 7 cervical, 13 dorsal, 6 lumbar, 4 sacral, and 17 caudal. The 

 frontal bones are suddenly compressed between the orbits, but their upper surfaces are smooth 

 and flat, the temporal ridges not meeting upon them. The humerus shows a well-marked 

 deltoid process. The third trochanter is feebly indicated upon the femur. The pollex is 

 rudimental on the fore foot. The hallux is fully developed, though short, on the hind foot. 



Presented by Sir Joseph Banks, Bart., P.R.S. 



2222. The skull of a larger specimen, probably a male, of the Field Vole (Arvicola 

 arvalis). Presented by William Cliff, Esq., F.R.S. 



