90 MR. R. F. TOMES ON THE GENUS MONOPHYLLUS. [Mar. 12, 



rounded process at the base in a line with the incisors, and another 

 one in a line with the premolars. The first premolar has an interval 

 on each side of it ; it is of considerable size, very much compressed, 

 and has three well-marked cusps, of which the middle one is long 

 and acute, the other two being equally pointed, but very short. 

 The second ])remolar is placed in proximity to the molars ; it has 

 somewhat the form of the first, excepting that the hinder accessory 

 cusp is less distinct. The true molais, when viewed directly upon 

 their crowns, exhibit a considerable development of their inner poste- 

 rior angle, which may be said to project into the palate. Otherwise 

 these teeth are feebly developed, and have the W-shaped crowns 

 which usually characterize the insectivorous species very imperfectly 

 defined. The outer anterior cusp is somewhat produced, and has a 

 forward direction, which is most distinctly visible externally. 



The lower incisors in som.e specimens examined were found to 

 be wholly absent ; in others, part of them only had been lost ; 

 whilst in a few instances all were retained, and were as follows : — 

 In number they correspond to those of the upper jaw ; they are of 

 rudimentary form and size, being mere rounded tubercles, and the 

 inner ones very minute ; they are placed far apart, especially the 

 two inner ones, between which is a space which appears wide enough 

 to allow the tongue to pass between them. The canines are thin and 

 long, with an internal cingulum. The first premolar is very much 

 compressed, and has a single cusp, which forms an obtuse angle 

 when seen laterally, and presents a thin edge when seen longitudi- 

 nally ; near to its hinder part is a slight indentation, or indication 

 of a separation into a posterior lobe or cusp. This tooth is almost 

 in contact with the canine, and with the second premolar, which is 

 not shaped hke the first in the lower jaw, but like the first one in 

 the upper jaw ; that is, it has three cusps. Succeeding to this tooth 

 is an interval, which is followed by the third premolar, shaped like 

 the second, and in contact with the true molars. These latter are 

 compressed, and have five pointed cusps, four of which form an irre- 

 gular longitudinal row, and the fifth is placed outside of the posterior 

 one of the four. 



The following will explain the number, and in some measure the 



position, of the teeth of this species : — 



T 11—11 /--, 1—1 T, 1 1—1 — 1—1 TVT^i •"*— 3 16 „, 



Inc. ^-ij^n; ^an. j-^; Premol. ^.i_i_y_^.y ; Mol. g— 3-- = 34. 



Under the name of Phyllophora, Dr. Gray has separated such 

 species of M. Geoffroy's genus Glossojyhaga, as have the tail and 

 interfemoral membrane develo})ed as in G. amplexicaudata* ; whilst 

 such as are without tail he has denominated Anoura, of which G. 

 ecaudata is the type. A third genus has been adopted by Dr. Gray, 

 which is typified by the species I have been describing, the name 

 originally given by Dr. Leach being retained. Without adverting 



* I do not know at present how Nicon differs from Phyllophora. There ap- 

 pears to be considerable obscurity about the genera of this group of Bats, which 

 has been occasioned in great measure by the bad state of Leacli's specimen of 

 Mo7iopht/llus. 



