1865.] MR. W. OSBURN ON THE BATS OF JAMAICA. 81 
12. Arcriseus, sp.? * 
Dental formula, M. —*, C. =, I. +=28. 
4—4? I=)? 
Molars. Upper, two larger much flattened on crown, with an 
exterior jagged edge—posterior with one point, the other with two ; 
false molars longer, with one point. Lower, two larger, with points 
on internal as well as external side; two false longer, with a single 
point. 
Canines rounded. 
Incisors. Upper, middle wedge-shaped, one notch ; lateral minute 
or wanting. Lower of equal length, one-notched. 
Tongue extensible about 3 inch ; posterior half with large papille, 
anterior half roughened, with asperities scarcely visible under the 
lens, but very perceptible to the touch. Muzzle to base (along 
back) 3 inches, muzzle to fork 34; tail0; expanse 162; radius 22; 
carpus to tip 43; first digit 23; fourth digit 31; leg 2; foot 2; 
calcaneum +. Interfemoral forked, when stretched out 2 inch below 
body. Irides hazel; eyes large. Colour of fur leaden grey, brindled 
by each hair being whitest towards the tip. 
“* Montego Bay, 16th May, 1859. 
£* Four skins, among which two males and one female. In a 
cave close by the town, and of no great depth, I procured several 
specimens of this Artibeus. It was in great numbers, and associated 
with Artibeus carpolegus, of which there were a few. The floor of 
the cave was strewn with kernels, large seeds, &c.; and among the 
most recent were seeds, with a portion of pulp sticking to them, of 
the scarlet berries called by negroes ‘cherries,’ and which I believe 
are the berries of Cordia collococca. 'The fact of the two species 
being found together, and, above all, the colour of the fur of a 
young sucking Bat attached to the mother (undoubtedly Artibeus 
carpolegus) being of a leaden colour, long kept me in doubt as to the 
distinctness of the two species. I have however determined to 
enter them as such provisionally. I found males and females of both 
with the reproductive organs conspicuous, and evidently adults.” 
13. Monoruyiivst. 
Dental formula (from prepared skull), M. 2==, C. = 1 = =32. 
Molars small. Upper, two false—first minute, scarcely above gum, 
second the largest of the molars, with a single ‘very blunt point ; 
three true, first largest ; this and second with the outer edge slightly 
hollowed, leaving two blunt points or tubercles, a small crown inter- 
nally ; third minute. Lower, two false—first a round, smooth, blunt 
cone or tubercle, second largest, the same; three true, as in upper 
jaw, hollowed so as to leave two blunt obsolete points in each (or 
tuberculated). These molars are evidently more adapted for holding 
than masticating. 
Canines. Upper very long, powerful, sharp, dilated laterally 
[* A. brachyotus (Pr. Max.), Tomes, /. c. p. 64.—P. L. 8.] 
[t Phyllonycteris poeyi, Gundlach; Tomes, J. c. p. 63.—P. L. 8.]| 
Proc. Zoou. Soc.—1865, No. VI. 
