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ZOOLOGY OF THE VOYAGE OF THE BEAGLE. 
WEST COAST. 
Valparaiso. 
Mus Renggeri. 
decumanus. 
Concepcion. 
Mus longicaudatus. 
Chiloe and Chonos Archipelago. 
Mus brachiotis. 
EAST COAST. 
Buenos Ayres. 
Mus decumanus . 
Bahia Blanca. 
Mus Braziliensis. 
elegans. 
gracilipes. 
Rio Negro. 
Mus griseo-flavus. 
Port Desire. 
Mus canescens. 
St. Julian. 
Reithrodon cuniculoides. 
xanthopygus. 
Reithrodon cuniculoides. 
Santa Cruz. 
Mus canescens. 
micropus. 
xanthopygus. 
Reithrodon cuniculoides. 
Falkland Islands. 
Mus decumanus. 
Musculus. 
Straits of Magellan. 
Mus xanthorhinus. 
Magellanicus. 
Reithrodon chinchilloides. 
Section— HYSTRICINA. 
Family — ? 
Myopotamus Coypus. 
Myopotamus Coypus, Auct. 
“ This animal, in Chile, is known by the name of “ Coypu at Buenos Ayres, 
where an extensive trade is carried on with their skins, they are improperly 
called ‘ nutrias,’ or otters. In Paraguay, according to Azara, their Indian name 
is ‘ guiya.’ On the east side of the continent they range from Lat. 24° (Azara) 
