7iew Mammals from Tropical South America. 515 



Dimensions of the type (measured as a spirit-specimen) : — 



Head and body 128 mm. ; tail 174 ; hind toot 21*5 ; ear 25-5. 

 ' Skull : greatest length 39*5 ; condylo-basal length 38 ; 

 zygomatic breadth 22 ; nasals 18x5'2; interorbital breadth 

 G"5 ; palatal length '2'2 ; three anterior molariform teeth 6"2. 



Hab. Island of Grenada, West Indies. Type from 

 Annandale. 



Type. Adult female. B.M. no. 87. 6. 30. 5. Collected 

 during the Grenada Eclipse Expedition of 1886, and pre- 

 sented by G. H. M. Murray, Esq. Three specimens 

 examined. 



Marmosa tohagi, sp. n. 



Size about as in M. grenadce, but skull more slenderly 

 budt. General colour nearly as in the Trinidal Marmosa, 

 dark cinnamon, becoming more russet posteriorly, above ; 

 below creamy or bufFy white, the hairs of tiie ventral region 

 nearly all slaty at base. Mammary formula not known. 



Skull narrower and with more slender muzzle than that of 

 M. grenadce. 



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



Htad and body 137 mm.; tail 19(3 ; hind foot '12. 



Skull: condylo-basal length 37'5; zygomatic breadth 20; 

 nasals 16*2 x 5*6 ; interorbital breadth 7; palatal length 21; 

 tiiree anterior molariform teeth 6"1. 



Hah. Island of Tobago, West Indies. 



Type. Adult male. B.M. no. 97. (3. 7.53. Collected 11th 

 March, 1897, and presented by Dr. Percy Kendall. 



Mar 



niosa nescea 



, sp. n. 



Size comparatively large, form stouter than in either the 

 adjacent mainland or Tobago animals. General colour above 

 between cinnamon and tawny, tending more towards ochra- 

 ceous on cheeks and flanks. Under surface cream-buff, the 

 hairs on the abdomen slaty at base, those on throat, centre of 

 chest, and inguinal region buffy to their roots. 



Skull larger and heavier than in the allied forms, the 

 zygomata widely expanded. Supraorbital ridges thick and 

 heavy, but rarely angularly projected over the orbits. 



Dimensions of the type (measure i in flesh) : — 



Head and body 159 mm.j tail 2U9 ; liind foot 27; ear 26. 



Skull: greatest length 42-3; condylo-basal length 41; 



34* 



