530 



I'HYLLOSTOMIDJi. 



present in every species of the genera allied to Artibeus, and there- 

 fore not to be depended upon as a distinguishing character, appears 

 to be, however, much more marked in this species than in any- 

 other, the membrane between the index finger and the metacarpal 

 bone of the third finger being 0-4 inch wide in the centre. 



a. (S jram., al. (type). Cuba. W. S. MacLeay, Esq. [P.]. 



26. AMETRIDA. 

 Ametrida, Gray, Ann. ^- Mag. Nat. Hist. xix. p. 407 (1847). 



Muzzle exceedingly short and broad, crown of the head greatly 

 elevated above the face-line ; ears, nose-leaf, and chin-warts as in 

 Stenoderma. 



Dentition. Inc. ■^, c. j^j, pm. g^, m. 3^. 



Teeth very similar to those of Stenoderma ; palate wider and 

 shorter ; horizontal plate of the palate-bones deficient behind. 



This genus, founded on a single species, differs mainly from Ste- 

 noderma in the great elevation of the crown of the skuU above the 

 short and ^'ery broad facial portion. Although this seems to be a 

 very important character, I think it doubtful, considering the great 

 similarity in the dentition and in other respects, whether Ametrida 

 can be recognised as more than a subgenus of Stenoderma. 



1. Ametrida centurio. 



Ametrida centurio, Gray, Ann. Sf Maq. Nat. Hist. xix. p. 407 (1847) ; 



Peters, MB. Akad. Berl. 1866, p. 396. 

 Phyllostoma centurio, Wagner, Suppl. Schreh, Saugeth. v. p. 629 



(1855). 



Head very short and broad, and, owing to the shortness of the 

 neck, appears to rest between the shoulders ; face flattened in front ; 

 the opening of the mouth almost wholly anterior, the lower jaw 

 projecting beyond the upper in front; crown of the head greatly 

 elevated above the face-line ; eyes large, prominent ; ears separate, 

 shorter than the head, in general form as in Stenoderma, the tip 

 rounded off, the outer margin concave below the tip, then convex 

 agaiji, concave opposite the base of the inner margin of the tragus, 

 terminating in a long rounded lobe midway between the base of the 

 outer margin of the tragus and the inferior margin of the eye, 

 below which a small wai-t is placed ; tragus straight, acutely pointed, 

 the outer margin with four prominent tooth-like projections : nose- 

 leaf as in Stenoderma, but comparatively broader and shorter, the 

 front margin of the horseshoe slightly raised, the erect terminal 

 leaf nearly as broad as the horseshoe in the centre, abruptly nar- 

 rowing above and terminating in an acute point ; between the 

 postero-extemal margin of the horseshoe and the eye, on each side, 

 a prominent obliquely placed glandular process, on the summit of 

 which the openings of three pores are seen ; chin with a small cen- 



