436 PROCEEDINGS OF THE ACADEMY OF [April, 



Head. — Essentially as in M. ivaterhousii jamaicensis. 



Limbs. — As in M. iv. jamaicensis, but slightly smaller. 



Fur. — As in the other forms of the ivaterhousii group, except that the 

 furring of the base and proximal part of the internal margin of the ear 

 is more marked than in any other form. 



Color. — Apparently two extreme types of coloration exist in this 

 form, which may be sexual, l)ut the available material is not in condi- 

 tion to justify any statement beyond the fact that the two phases exist. 

 The one extreme is a deep browni, while the other (represented by but 

 one skin) is a rather dark ferruginous. Two specimens have a slight 

 tendency toward the ferruginous type, the upper surface being slightly 

 suffused with that tint while the lower surface is that of the browm 

 form. Brown phase: Above seal brown, the hair with slightly more 

 than the basal half white, region l^etween the ears and posterior to 

 the connecting membrane blackish; below the hair is wliite basally, 

 then conspicuously annulate with drab and rather obscurely tipped 

 with silvery; membranes blackish-brown. This type is distinctly 

 darker, both above and below, than anj' of the other West Indian forms. 

 Red phase : Above and below dull ferruginous, the hair unicolor ; patch 

 between the ears blackish ; memJDranes black. In one of the apparently 

 intermediate specimens mentioned above, the hair of the upper surface 

 is whitish basallj^ with a median annulation of smoke gra3\ 



Skull. — Of the general type of M. iraterhousii, but distinctly smaller 

 than any of the related forms. As specimens from the eastern part 

 ofpuba approximate slightly toward the Jamaican type, a slight differ- 

 ence in size is noticed in comparing the skulls of individuals from the 

 two extremes of the island. 



Teeth. — Essentially as in M. w. jamaicensis, but the first upper pre- 

 molar is slightly narrower and the lower premolars are distinctly more 

 longitudinal and compressed. This latter character alone will immedi- 

 ately demonstrate the fact that while specimens from the eastern part 

 of the island slightly approach jamaicensis, theyjare inseparable from 

 typical minor from western Cuba, when the dentition is considered. 



Measurements. — Average of twelve specimens: Total length 90.7 

 mm. (84.5-96.5); head and body 59.9 (55.5-65); head 25.1 (25-30); 

 ear 26.3 (21.5-30); greatest width of ear 17.3 (15-19); tragus 8.6 

 (7.8-10) ; forearm 51.4 (49-54); thumb 14.1 (12.5-15); third digit 85.1 

 (81-88); tibia 21.2 (19-22.5); calcaneum 10.9 (8.5-12.3); foot 13 

 (10.5-15.5); tail 30 (20-37). 



Average of five skulls: Total length 23.8 mm. (23.5-24.3); greatest 

 zygomatic width 11.3 (11-12); interorbital width 3.9 (3.5-4.1); height 



