532 
CHIROXECTES VARIBGATUS. 
visible; and beyond this, we find that at the time that the 
last true molar of the Opossum is in this undeveloped con¬ 
dition, the hindennost of the milk teeth is shed to make way 
for a permanent false molar which takes its place; there 
would then, however, be a vacant space between die second 
false molar and the first true molar, and such a vacancy is 
not noticed by Mr. Ogilby 1 . 
CHIROXECTES VARIEGATES. 
Water-Opossum. 
(Plate 17, fig. 1). 
Zimmerman, Geogr. Gcscbicht. ii. p. 317. 1780. 
Boddakrt, Elea elms Animnlium, i. p. 163. 1785. 
Shaw, General Zool. toI. i. Pt. 2, p. 447. 1800. 
Illigrr, in Abh. der Berl. Acad. 1811, p. 107. 
Desmarest, Maamialogie, p. 261, 1820. Diet. 
dcs Sci. Nat. tom. xlrii. p. 400. 1827. 
(Geoff.) Fischer. Synopsis Mainmalium, p. 266. 
1829. 
Pef/e Loutre de la Guyane. Bcrros, Hist. Nat. Suppl., tom. iii. p. 159, 
Tab. 22. 1776. 
Saricorimne. Pennant, Quad., rol. ii. p. 355. 1781. 
Vapock. Cuv., Regnc Animal (cd. 1817), tom. i. p. 174. 
Ears large and naked ; tail longer than the head and body taken 
together ; fur short, dense, and somewhat woolly ; upper 
1 1 bare thought it desirable to make these remarks, because I find Dr. 
Schinz, in his recently published work upon Mammalia, lias adopted as the 
true dental formula of the Cbironectes, that which has been found in one 
specimen only — the specimen examined by Mr. Ogilby, and for the reasons 
stated I am by no means satisfied that this animal, when adult, does not 
present (as M. F. Cufier has stated it actually does) the same dentition as the 
true Opossums. 
Lutra minima. 
44 44 
44 Sarcorienna. 
Chironecles rarieyalut. 
44 Vapock. 
Didelphyt palmata. 
