Mammals from the Island of Tobago. 69 



appears to be sufficient to warriuit tlie pultlicatioii ot" a short 

 ijore upon them. 



It has seemed unnecessary to include the synonymy of 

 these species, as both are treated in considerable detail by 

 Glover M. Allen in his recent paper on the mammals of the 

 West Indies (Bull. Mus. Comp. Zool. vol. liv. li)ll, no. G, 

 pj). 175-263). 



Murnosa tohagi, Thomas. 



Local name. — Manicon Rat ; known on Grenada and the 

 Grenadines as Manicou Gros-yeux. 



Material. — One imperfect skin, unsexed, and without the 

 .skull. 



Compared with a specimen of Marmosa cliapmard from 

 Trinidad in the collection of the U.S. National Museum this 

 example is found to be somewhat more greyish dorsally, 

 while the cinnamon along the sides is paler. The ear is 

 much smaller, measuring only 17 mm. in length. The hind 

 foot is noticeably .smaller. The specimen from Trinidad is a 

 male, while there is a possibility that the one from Tobago is 

 a female, and a probability that it is young. 



Dr. Glover ]\l. Allen states that two specimens which he 

 obtained on Grenada " are identical in size and cranial 

 measurements with a topotype of M. chapmani from Caura, 

 Trinidad ; they are, however, slightly jaler cinnamon along 

 the side?. . . .'■' 



Mr. Oldfield Thomas has recently described the Marmosi 

 occurring on Tub:igo under the name of Marmosa tohagi. 

 Though the characters separating this form from M. chapmani 

 do not appear to be of much significance, it has seemed best 

 to use the name at least until a good series from Tobago is 

 available for study. 



Remarks. — Mr. Oldfield Thomas has described the "manicou 

 gros-ypux^^ of Grenada under the name of Marmosi grenadce ; 

 but Allen can find no ditference between the specimens from 

 Grenada and those from l^-inidad except the very slight one 

 in the colour, which he says " is apparently not more than 

 individual variation." 



It is quite possible that the murine opossum was uninten- 

 tionally introduced by man into the Grenadines, and ))erliap3 

 into Grenada also, from Trinidad, for its presence in tlie 

 fauna of these islands is somewhat anomalous, and, on 

 account of its small size and nocturnal and secretive habits, 

 it is the most easily carried from place to place, concealed in 



