Mammals from British Guiana. 143 
Dimensions :— 
Forearm of the type 59 millim. 
A spirit-specimen (3) measures: head and body 75; 
tail 16; nose-leaf, extreme length 17, breadth of horseshoe 
8:3, of lancet 8'°5; ear 27; tragus, length on inner edge 7°5 ; 
forearm 59; third finger, metacarpus 53, first phalanx 16:5, 
second phalanx 29:5; fifth finger, metacarpus 53, first 
phalanx 12°5, second phalanx 13°5; lower leg 23; hind 
foot (c. u.) 15; calcar 19. 
Skull of type: greatest length 27:5 ; basal length 21:5 ; 
zygomatic breadth 16; constriction 4°8; front of canine to 
back of m.* 10:4. 
Type. Male. Original number 199. B. M. no. 1. 6. 4. 43. 
This is most distinct from either of the two smaller 
species of Phyllostoma, Ph. elongatum and discolor, and 
cannot be confused with either of them, though nearest to 
the former. Alectops ater, Gray, said to be from Surinam, 
has a long tapering nose-leaf to which there is a well-marked 
rib, just as in Ph. elongatum, with which it is united by 
Dobson. 
11. Hemiderma brevicauda, Wied. 
Six skins and three spirit-specimens. 240, 600, 1000, 
and 2000 feet. October to December. 
12. Glossophaga soricina, Pall. 
Two in spirit. 600 feet. November. 
13. Artibeus planirostris, Spix. 
Nine skins and two spirit-specimens. 240 feet. October 29. 
14, Artibeus cinereus, Gerv. 
Three skins and one spirit-specimen. 240 feet. November. 
15. Mesophylla Macconnelli, gen. et sp. nn. 
a. Skin, 2. No. 155. November 8. 2000 feet. Type. 
6. Immature, in spirit, ¢. No. 157. November 8. 
2000 feet. 
MESOPHYLLA, gen. nov. (Phyllostomide). 
Allied to Vampyrops and Ectophylla, but differing from both 
by the structure of its teeth, and especially its m,, a tooth 
diagnostic in this group, and in addition from Vampyrops by 
igi 
