188 On Mammals from the River Supinaam. 



In the above characters the eight specimens are quite 

 uniform inter se, the only variation being in the general body- 

 colour, which varies considerably, though never so rich a 

 rufous as in (E. tapajinus or so pale as in (E. marmosurus. 



One 



13. Neacomys guiance, Thos. 

 14. Loncheres chrysurus, Zimm. 



One. 



It is unfortunate that the unsuitable name chrysurus, based 

 on the " Lerot a queue dore*e" of Buffon, should antedate the 

 better known cristatus, but there can be no doubt as to its 

 technical applicability to this animal. 



The only previous examples of this rare animal that the 

 Museum has received are one from Sir R. Schomburgk and 

 one from Dr. Bovallius. An example of the nearly allied 

 but smaller L. paleacea, Illiger, of Para, has also been received 

 from the Para Museum. 



15. Proechimys cayennensis, Desm. 

 Five. 



16. Dasyprocta rubrata, Thos. 

 Three young. 



17. Brady pus tridactylus, L. 



One. 

 Two. 



Three. 



One. 



Two. 



One. 



One. 



18. Choloepus didactylus, L. 

 19. Tamandua tetradactyla ) L. 



20. Cyclopes didactylus, L. 



21. Didelphis marsupialis, L. 



22. Metachirus opossum, L. 



23. Metachirus nudicaudatus, Geoff. 



