ORDER QUADRUMANA. 65 



instinct, and adhere to it until they have grown 

 to the size of a mouse, which does not take 

 place till after the fiftieth day, when they open 

 their eyes. They do not discontinue their visits 

 to the pouch until they are as large as rats. The 

 period of gestation in the uterus is only twenty- 

 six days. 



The Crab-eater, or Great Sarigue of Cayenne, Brazil, 8fC. 

 (Did. Marsupialis et Did. Cancrivora, L.) Buff. Supp. 



III. LIT. 



Of the size of the preceding ; yellowish, mingled 

 with brown ; a brown line on the forehead ; 

 lives in marshy places near the sea-shore, and 

 is sustained principally on crabs. 



The four-eyed, or middle-sized Sarigue of Cayenne. (Didel- 

 phis Opossum, L.) Buff. X. xlv. xlvi. 



Chestnut or fawn-coloured above, whitish below. 



A spot of pale yellowish above each eye. Larger 



than a large rat. 

 Some other species have no pouches, but merely 

 a fold on each side of the belly, which is but the 

 vestige of a pouch. Their custom is to carry their 

 little ones on their backs, with the tails twisted 

 round that of the mother. 



The Cayopollin. (Did. Cayopollin, Did. Philander, Did. 

 • Dorsigera, L.) Buff. X. lv. 



Yellowish gray ; the circumference of the eyes 



Vol. II. F 



