new Neotropt'cal Mammals. 221 



parietals, but apjrarently not coalescing with those that run 

 forwards from the outer corners of the interparietal. Hamular 

 processes spatulate, much broader than tiiose of E. chrij- 

 sceolus. 



Dimensions of the type (measured iti the flesh by col- 

 lector) : — 



Head and body 300 millim. ; tail 150 ; hind foot (s. u.) 51, 

 (c. u.) 55; ear 14. 



Skull : bregma to nasal tip 42 ; greatest breadth 31 ; 

 nasals 23'5 x 7*5; interorbital breadth 15"8 ; greatest breadth 

 on ridges 25 ; palate length from henselion 23 ; diastema 14*2 ; 

 palatal foramina 6"5x 3'7 ; length of upper molar series 9"2. 



Ilab. Bogava, Chiriqui, N.W. Panama. Alt. 250 m. 



Type. Male. Original number 6. Collected 3rd Septem- 

 ber, 1898, by Mr. H. J. Watson. Six specimens examined. 



The very dark colour of this Echimys will readily distin- 

 guish it from the other Central-American forms. 



Marmosa caiiccPj sp. n. 



Allied to J/, incana, Lund, and M. fuscata, Tho.=., but 

 smaller than the first and paler-coloured than the second. 



Size about as in M. fuscata. Fur soft, short, and close, 

 about 7-8 millim. long on the back. General colour above 

 uniform soft fawn-grey, not unlike that of M. incana, but 

 rather more fawny, and also more uniform, less wavy ; centre 

 of face rather paler than back ; black eye-patch present 

 above and below (though not behind) the eye, extending 

 forwards to the roots of the whiskers ; its edges not sharply 

 defined. Ears naked, rather small as compared with the large 

 ears of the allied species, their anterior bases without marked 

 projection. Under surface pale yellowish white, the hairs of 

 chin, throat, chest, and a narroiv line down belly of this 

 colour to their bases, those of the sides of the belly slaty for 

 two thirds of their length. Outer sides of limbs like Ijack, 

 inner sides like sides of belly ; hands and feet thinly haired, 

 dull whitish above, wrists and ankles brown. Tail as in 

 the allied species, rather shorter, but doubtfully perfect in the 

 single specimen. 



Skull on the whole very similar in general shape to that of 

 M. incana, and therefore quite different to that of all the 

 species of the 31. murina group. Nasals broadened poste- 

 riorly, their extension behind the broad part not so elongated 

 as in M. incana. Supraorbital region long, narrow, nearly 

 parallel-sided, flattened above, its edges rounded, without 

 ridges or processes. Anterior palatal foramina extending to 



