THE SKULL AND TEETH OF ECTOPHYLLA ALBA. 269 
Trichocorys, the palate is rounded, as a rule excavated and rarely reaches a point 
answering to the anterior root of the zygoma; the lower jaw has no well-defined posterior 
border, the boldly deflected angle almost reaching the condyloid process. 
The position of Eetophylla in the Stenodermine is shown in the synoptical natural 
key. Brachyphylla is an annectant genus to the Glossophagina through Phyllonycteris 
Artibeus, Dermanura and Sturnira apparently relate to the Vampyri, but while the 
structure of the molars is essentially that of this group, no annectant form is known. 
Sturnira in the simplicity of the tooth structure recalls Hemiderma. The relation 
between the remaining genera of the table is intimate. The Stenodermine constitute, 
with the exception of the Heamatophilhia, the most aberrant group of the Phyllostomidide. 
I recognize, therefore, the following natural arrangement of the genera : 
Subfamily STENODERMATIN#. 
eae linam ny llinie ne Seen aes. cste ha hreiad. see Brachyphylla. 
( Artibeus. 
P Nor tillye lines eis eee eh re Mice Bare | Crake 
Dermanura. 
| Sturnira. 
( Chiroderma. 
*, | 4 
Ghimocleriminiiee eee ehh ae = ca haan ee : Vampyrops. 
| Eetophylla. 
( Stenoderma. 
| Pygoderma. 
aie 1 Centurio. 
Stemod ermine cy eet kaa ks saan : 
Trichocorys. 
Ametrida. 
y . 
| Spheronycteris. 
A Natural Synoptical Key of the Stenodermide, Based on Characters Derived from 
the Skull and Teeth. 
I. First lower molar elongate with paraconid distinct. 
[ a. Angle of lower jaw broad, scarcely pointed, concave above, not deflected, ascending 
\ ramus defined. Hard palate oblong, palatal bones produced. Upper incisors coni- 
| cal, molars $ ; crowns coarsely ridged ; all cusps of the first lower molar subequal... 
l Brachyphylla. 
Group Brachyphyllini.... 
* Ohiroderma is not as near Vampyrops and Ectophylla as the members of other groups are to each other, 
