SPECIES OF AIIVICOLA. 
curved, convex transversely, chissel-shaped, close, even at 
the end. The two under ones are long, curved, somewhat 
cylindrical, rounded at the end, sharp-edged, and sloping 
externally, chissel-shaped. There are three grinders above 
and below on each side, in a straight very close series, with 
the sides forming perpendicular ridges and grooves, the 
crown narrow, flat, and presenting a zigzag appearance. 
The first upper grinder has three internal and three exter- 
nal ridges ; the second, which is smaller, has two internal and 
three external ridges ; the third, which is smaller, but as 
long in the crown, has three internal and four external 
ridges. The first lower grinder, which is equal in size to 
the two others, and much larger than that of the upper jaw. 
has five internal and four external ridges ; the second has 
three internal and three external ridges ; the last has also 
three internal and three external. 
Internally of the mouth, at the commissure of the lips, is 
a tuft of whitish, shining, bristly hairs, directed inwards, 
downwards and backwards, from a thickened callous surface. 
The palate is tuberculate : the first or anterior tubercle, 
small and triangular ; the second broader and thicker ; the 
series then separates into two, and terminates with two 
smaller on each side, opposite the first grinder. The tongue 
is longish, somewhat cylindrical, smooth, and of a carmine- 
red colour. The stomach is rather large, double, or divided 
into two portions by a contraction, its internal surface cover- 
ed with flat tubercular patches. The rest of the intestinal 
canal is extremely thin in its walls. The small intestine 
enters the large at right angles. The latter presents an 
enormously large convoluted coecal extremity, occupying the 
right side of the abdomen. The liver is large, with four 
nearly equal lobes, lying over and partly enclosing the sto- 
mach. The kidneys are also large, reniform, with a very 
distinct renal capsule. 
