CLASS I. MAMMALIA: ORDER 13. MARSUPIALIA. 669 
THE CAYOPOLLIN OPOSS0M. 
numerous species. The Crab-eating Opossum, cancrivora, is a large species, lives in marshy 
districts, and feeds on crabs. It is found in Guiana. Azara's Opossum, D. Azarce, abounds in 
Brazil and other warm parts of South America. The CAYOPOLLiiir Opossum or Naked-tailed 
Philander, J), philander ^ or D. nudicaudata, is found in Guiana. Nearly twenty other species 
of opossum are found in Brazil and other parts of South America. 
THE TAPOOK. 
Genus CHEIRONECTES : Cheironectes.—Of this there is a single species, the Yapocb:, G. Ya- 
pock, which resembles the otters, having palmated feet, and swimming with facility. Buffon calls 
it the Little Otter of Guiana. It feeds on small fishes and aquatic insects, and is found in Brazil. 
Gemis PHALANGISTA : PJmlangista.—The animals of this genus, called Fhalangers, are noc- 
turnal, live in trees, have a prehensile tail, feed on vegetables and insects, possess an opposable nailed 
