MAMMALIA. 
Ill 
fore legs; covered with spines from the back of the head to the 
root of the tail; white at their base, and black towards their 
extremity; the upper surface of each with a deep groove: 
whiskers very long. Length of the body one foot; tail five 
inches. Inhabits the Island of Fernando Po. 
Genus 24.— Chinchilla. — Bennet. 
Generic Character .—Incisory teeth |, no canines, grinders • 
total 20. The three anterior grinders of the upper jaw formed 
of three parallel bony portions, the third separated from the 
rest by a deep groove, with three alternating lines of enamel, 
and the fourth having an additional portion of bone and enamel; 
head round, eyes large ; ears very large, broad, and rounded ; 
fore feet with four] toes, and a rudimentary thumb; hind feet 
also with four toes, three of them long, the middle more pro¬ 
duced than the two lateral ones, the fourth, or external toe, 
very short, and placed far behind ; claws short, and nearly hid¬ 
den by tufts of hairs •, tail half the length of the body, usually 
turned upwards. 
Chinchilla lanigera .— The Chinchilla. 
Plate XXI. fig- 10. 
Fur ash-gray and white, and exceedingly soft; ears large, be¬ 
ing nearly as long as the head; eyes large and black ; moustaches 
plentiful, and very long, the longest being twice the length of 
the head, some of which are black and others white. Length 
of the body nine inches, and tail five. Sits usually upon its 
haunches, the fore legs being shorter than the hind ones. In¬ 
habits Chili and Peru. 
Genus 25. — Lepus _ Linnceus. 
Generic Character. —Incisory teeth no canines, grinders 
total 28. The upper incisory teeth are placed in pairs, two 
wedge-shaped, with a longitudinal furrow in front, and two 
smaller ones immediately behind; the under incisory teeth 
square; grinders with flat crowns and transverse lamime of 
enamel; ears and eyes large ; fore feet with five toes, and the 
