1861.] MR. R. V. TOMES ON THE GKNTJS MON©PHYLLUS. 89 



is attached rather than mcluded in it, as it is in Fesperiilio. The os 

 calcis is rudimentary. 



The feet are much stronger than those of G. awplexicaiidata, and 

 fully equal in actual size to those of G. eccmdata, which is a larger 

 species ; they are therefore relativehj larger than in that species. 

 The claws are long, strong, and hooked. 



All the face is suffused with very short hairs, of the same quality 

 as those of the head ; on the lips and nose-leaf they are so short as 

 to he almost invisible without the aid of a lens ; but, with the ex- 

 ception of the triangular space containing the nostrils, and the front 

 part of the under lip, no part can properly be said to be quite naked. 

 The ears, however, are naked, saving a small portion of their outer 

 surface, which is quite at their root. The fur of the under parts 

 extends a little on to the humerus and the membrane near it,' and 

 to a trifling extent on to the proximate end of the fore-arm ; but 

 everywhere else the membranes are naked. 



The cranium is of a very elongated form, which is due in great 

 measure to the great length of its facial part. In general appear- 

 ance it resembles that of G. amplexicaudata ; and it will be necessary 

 only to state in what respect it differs from that of the latter species. 

 In G. amplexicaudata the skull is perfectly devoid of ridges or crests; 

 but in Monophyllus two ridges from the supra-orbital processes pas3 

 inwards and backwards, much as in Phyllostoma hastatum, and, 

 meeting in the centre of the space between the orbits, unite to form 

 a sagittal crest, which is not, however, very prominent, and does not 

 extend to the occipital suture. The hinder margin of the palate 

 (which extends far back in these allied species) is much more deeply 

 and narrowly emarginate in MonopJnjllus than in the other species 

 compared with it. The inferior margin of the lower jaw of Monophyl- 

 lus presents a difference from the same part in G. amplexicaudata, 

 which is as follow^s : — In the latter species this margin curves oif 

 quite evenly to the posterior angle or process, which is acute, equally 

 prominent with the condyle, and directed obliquely upward in pre- 

 cisely the same degree. In Monojihyllus the lower margin of the 

 jaw is most convex just opposite to the anterior root of the coronoid 

 process ; and behind this is a shallow indentation, which is increased 

 by the posterior process taking a somewhat downward direction, the 

 extreme point, however, being recurved. 



But the teeth of this species present a striking dissimilarity from 

 those of the other Glossophagine Bats with which they have been 

 compared. Although in number they correspond with those of G. 

 avqilexicaudata, in form and in position they have but little resem- 

 blance to them. The upper incisors are four in number ; they are of 

 a very simple form, being somewhat flattened, with their sides parallel; 

 the inner ones are the largest, — the outer ones being minute and 

 more rounded than the others, appearing to be little more than two 

 rounded tubercles. They are separated from each other, and from 

 the canines on either side, by intervals which are fully equal to the 

 breadth of the teeth themselves. The canines are long, pointed, and 

 angular, and are destitute of a cingulum, but have a well-marked 



