252 ON THE GLOSSOPHAGINA. 
large or larger than centrals. Canine concave on palatal surface. The first premolar with- 
out basal cusp and separated from the canine and the second premolar. The second pre- 
molar with basal cusp and in contact with the first premolar. The first molar much larger 
than the second, the paracone subtriangular, the outer surface of the paracone and mesacone 
are scarcely at all fluted, hence the W-pattern not evident. The second molar without 
fluting on the rudimental mesocone, hence the posterior limb of the second V is absent. 
The single lower incisor which is seen in the two examples lies in close contact. with 
the canine. The canines are large and divergent, projecting to the inner side of the lateral 
incisor. The three premolars are triangular with conspicuous cingules; lingual aspect of 
the first premolar concave and in contact with the canine; the second free from the first 
and the third premolar. The protoconid with a long anterior extension which has the 
value of a second functionalized cusp. The paraconid is small and placed slightly back 
of the protoconid. The mesoconid is higher than either of the other elements, and 
together with. the hypoconid form a low, broad heel. Molars slightly overlapping at 
buccal borders ; the metaconid and hypoconid are of great size with wide yalley. 
Metatarsi equal ; first row of phalanges decrease progressively from the second to 
the fifth. 
The measurements of Dobson do not agree in some respects with the three specimens 
examined. The thumb is smaller, while the first phalanx of the third finger is much 
larger. He states the “tail none or exceedingly short.” 
In the cheernycterine alliance the genera Chernycteris, Lonchoglossa and Anura 
are placed. They have in common three premolars and three molars in each jaw.* 
CH@RNYCTERIS. 
Naked skin fold defining nostril laterally. Pterygoid process in contact with tym- 
panic bone. No phalanx to second digit. Length of forearm, 42 mm.; thumb, 7 mm. 
Dental formula: 1. 4 — c. + — prm. 3 — m. 3 = 22. 
Chernycteris mexicana Tschudi. 
Auricle subelliptical, emarginate on posterior border; internal basal lobe large, 
entirely free from the head and hairy; external basal lobe small, acute; internal lappet 
conspicuous. Tragus elliptical; basal lobe simple, deflected backward.+ 
Interfemoral membrane longer than tibia, semicircular. Calcar half the length of the 
* The only other forms possessing the same armament are the remote genera Vespertilio, Cerivoula, Natalus and 
Thyroptera. 
+ In one specimen the tragus exhibited near the tip two papille seen on both the anterior and posterior borders and 
an additional cluster of three on the posterior surface. 
