Maimosa marmorata and elegans. 161 



Tyjye. Female. B.M. no. 2. 1. 1. 120. Original number 

 1399. Collected by Mr. Perry O. Simons. Three specimens 

 examined from the type locality, besides examples from the 

 other places mentioned above. 



Marmosa elegans pallidior. 



General characters much as in M. e. venusta, but the colora- 

 tion more pallid throughout. Dark dorsal area pale " drab- 

 grey," the lighter lateral areas contrasting but little with it. 

 Under surface practically wholly snow-white, but not so 

 sharply defined laterally as in M. marmota, as the grey bases 

 to the lateral hairs encroach a little on each side on to what 

 are, properly speaking, belly-hairs. Rump and backs of 

 bind limbs pale drab like the body; hands and feet snowy 

 white. Tail pale grey above, white laterally and below. 



Skull as in M. e. venusta. 



Dimensions of the type (measured in the flesh) : — 



Head and body 95 millim. ; tail 107 ; hind foot (s. u.) 14 ; 

 ear 24. 



Skull : basal length 25 ; length of three anterior molariform 

 teeth 4-7. 



An older specimen measures : — Head and body 104 ; tail 

 119; hind foot (s. u.) 15 ; ear 24*5. 



hah. Challapata, east of Lake Poopo, Bolivia. Altitude 

 3800 m. 



Type. Male. B.M. no. 2. 2. 2. 116. Original number 

 1650. Collected 26th October, 1901, by P. O. Simons. 

 Six specimens. 



^larmosa elegans Cinderella. 



Size as usual ; tail apparently rather longer in proportion. 

 General colour decidedly darker than In the other forms, 

 approximating to Bidgway's " broccoli-brown " ; light lateral 

 bands dull lawn, not strongly contiasting with the back. 

 Forehead darker, continuous with a comparatively broad but 

 ill-defined median frontal line. Under surface pale yellowish, 

 the bases of the hairs everywhere broadly slaty, except just 

 on the chin. Sides of rump and back of hips dark cinereous 

 grey, sometimes contrasting markedly with the body. Hands 

 and feet dull wLitish. Tail dark brown above, white laterally 

 and below. 



Skull as usual, except that as compared to true M. elegans 

 there is a more marked sbarpening of the supraorbital edges, 

 thus showing a certain inclination towards M. mannota. 



