ON THE GLOSSOPHAGIN”. 243 
as long as tibia. The calear is one-half the length of the tibia. The interfemoral mem- 
brane is often incised rather than semicircular.* The tip of the tail projects from the 
free margin of the interfemoral membrane. Tongue on dorsum free from retrose papill. 
The first phalanx of the first digit is as long as the metacarpal. Entire digit one- 
fourth or nearly one-fourth the length of the forearm (10 to 40, or 8 to 36). The first 
phalanx of the second digit is one-thirtieth the length of the metacarpal; the entire 
digit is not as long as the third metacarpal. The first phalanx of the third digit is 
smaller than the second; the third is flexible; the separation from cartilage tip is 
indeterminate. Metatarsi equal. The row of first phalanges of toes equal. 
The Skull—The brain case papyraceous; the position of the body and hemispheres 
of the cerebellum—the mesencephalon and prosencephalon—hbeing clearly outlined on the 
periphery. Pretemporal crests scarcely defined and not continuous with the orbital 
margin; mesotemporal not seen ; posttemporal not distinct from the occipital. 
The face vertex is flat with shallow median depression over the ethmoid bone. The 
convex nasal bones are outlined by grooves, of which the median is the widest and 
deepest. Each nasal bone is incised on its free margin at the anterior nasal aperture. 
The sides of the face are convex, with a conspicuous, though small fronto-maxillary 
inflation. The infraorbital foramen answers in position to the junction of the premolars. 
The lateral border of the anterior nasal aperture is produced ; between it and the promi- 
nence over the canine tooth a groove is defined. The height of the alveolus is one-third 
the width of the neck of the canine, and one-seyenth the vertical diameter of the anterior 
nasal aperture. The posterior border of the hard palate near the zygomatic root is 
spinose. The palatal notch at the mesopterygoid fossa is acutely incised, carried back to 
a line answering to the glenoid notch and is without median spine. It reaches a point 
opposite the posterior third of the zygomatic arch. The tip of the pterygoid process lies 
opposite the oval foramen. The ascending process of the zygoma is inconspicuous and 
rounded. Base of cranium with prominent, median, vomerine ridge. The lateral depres- 
sions on the basioccipital are conspicuous, the mastoid process is ebtuse. The tympanic 
bone is separated from the postglenoid process by an interval. The coronoid process of 
the lower jaw is carried above the level of the condyle and is subacuminate. The angle 
is hamular and deflected outward with a notch between it and the lower border of the 
masseteric impression and projects backwards slightly beyond the condyloid process. 
Symphysis not carinate. The junction of the ethmoid and sphenoid bones in brain case 
convex. 
The Teeth—TVhe teeth of Glossophaga are the best defined of any of the group. 
The cusps are sharp, the incisors and premolars are adapted for cutting, and the molars 
* Geoffroy expressed it thus, ‘‘ coupée en angle rentrant,’’ but this shape is often absent. 
