THE FAMILIES AND GENERA OF BATS. 
159 
iarities. Tail absent. Calcar short but distinct. Interfemoral 
membrane moderately wide. 
Species examined'. — Mesophylla macconnelli Thomas. 
Remarks. — As pointed out by Mr. Thomas, this genus is interme- 
diate between V ampyrops and Eetophylla. It seems much nearer 
the latter, however, with which it forms a distinct group character- 
ized by the basin-shaped m 2 and m 2 and the almost exact approxi- 
mation in form of m t and pm 4 . This last character is foreshadowed 
in V ampyressa and Vampyriscus. 
Genus ECTOPHYLLA H. Allen. 
1892. Eetophylla H, Allen, Proc. U. S. National Museum, XV, p. 441, Octo- 
ber 26, 1892. 
1898. Eetophylla FI. Allen, Trans. Amer. Philos. Soc., n. s., XIX, p. 267, 
pi. XVI. 
Type-species. — Eetophylla alba H. Allen. 
Geographic distribution. — Honduras and Nicaragua. 
Number of forms. — The type species. 
Characters. — In general not unlike Mesophylla , but lower molars 
only 2-2, and basin-shaped crown of m 2 and m 2 crossed by a dis- 
tinct median longitudinal ridge. Upper incisors with terete-conical 
crowns, the inner pair approximating basally. Canines, premolars 
(except pmj, and lower incisors as in Mesophylla. First upper 
molar differing from that of Mesophylla in presence of a distinct 
though low protocone. Second lower molar basin-shaped, the bot- 
tom of the concavity occupied by a conspicuous though simple lon- 
gitudinal ridge. As in Mesophylla , the tooth has only one cusp, a 
rather high paracone. Last lower premolar and first lower molar 
approximately alike and closely resembling the corresponding teeth 
in Mesophylla , except that each has a distinct though low postero- 
external cusp. Second lower molar very conspicuously basin-shaped, 
broadly oval, much wider than ramus of jaw, its edge with two small 
but distinct cusps on anterior border and a low, indistinct postero- 
external elevation. As in the corresponding upper tooth, the bot- 
tom of the concavity is crossed by a distinct longitudinal ridge. 
This ridge is noticeably bicuspidate, or perhaps might be better 
described as formed by the coalescence of two cusps.® Otherwise 
essentially like Mesophylla. 
Species examined. — E ctophylla alba H. Allen. 
Remarks. — This genus is not distantly related to Mesophylla. In 
dental characters it is one of the most aberrant of the Stenoderminse, 
though the skull is .not specially modified, and externally it has the 
appearance of a small, whitish V ampyrops. 
a The peculiar cuspidate character of this ridge is not well shown in Harri- 
son Allen’s figure of the dentition. (Trans, Amer. Thilos, Soc., n, s., XIX, 
pi. xvi, fig. 3.) 
