THE FAMILIES AND GENERA OP BATS. 245 



lating two small palatal foramina, or filling the entire space occupied 

 in Nyctinomus by the palatal emargination. When this closing c-f the 

 emargination is complete a slight anterior median notch is sometimes 

 developed, but this never extends behind incisors. Teeth similar to 

 those of Nyctinomus; m * and m - with well-developed hypocone. 



Species examined. — Ohcerephon angolensis (Peters), C. emini (de 

 Winton), C. gambianus (de Winton), C. hindei Thomas, C. jobensis 

 (Miller), G. johorensis (Dobson), C. limbatus (Peters), C. major 

 (Trouessart), C. plicatus (Buchannan), C. pumilus (Cretzschmar), 

 C. pusillus (Miller). 



Remarks. — This genus, though so closely resembling Nyctinomus as 

 to be indistinguishable except by the structure of the palate, is well 

 characterized by the complete condition of the premaxillaries. It 

 includes all the species without obvious palatal emargination, cur- 

 rently referred to Nyctinomus, and is evidently a natural genus. The 

 character on which it is now based is wholly unrelated to that which 

 Dobson originally assigned to the group. 



Genus EOMOPS Thomas. 

 1813. ? Myopterus Geoffroy, Descr. de l'^igypte, II, p. 113. 

 1905. Eomops Thomas, Ann. and Mag. Nat Hist, 7th sei\, XVI, p. 574. 

 November, 1905. 



Type-species. — Mormopterus whitleyi Scharff. 

 Geographic distribution. — West Central Africa. 

 Number of forms. — Only the tj r pe species is known. 

 Characters. — Dental formula : 



- 2 -. 1. 4567.1-1 1-1 1-1. 3-3 „„ 



1—1.-2-4567 % 3TT' ° \=V pm 2^2' ™ J^T^ 



Upper incisors strongly in contact with each other and with canines, 

 the shafts very slightly curved forward, their anterior face evenly 

 convex, their posterior face slightly concave; posterior basal expan- 

 sion slight but evident, directed somewhat outward. Lower incisors 

 in contact with each other and with canines, perfectly in toothrow 

 though not rising to level of cingulum of canines; anterior face of 

 crown slightly higher than long, deeply bifid, the inner lobe the 

 larger ; crowns extended back between canines in a concave posterior 

 heel, the general outline of which rather closely resembles the anterior 

 face in both size and' form. Canines simple, with low but distinct 

 cingula, that of the lower teeth forming a slight anterior cusp ; lower 

 canines separated by space equal to about one-fourth diameter of 

 crown; anterior face of upper canines with barely indicated longi- 

 tudinal groove. Upper premolar large, its crown area nearly three- 

 fourths that of first molar, its antero-internal cusp small but distinct. 

 Lower premolars closely crowded, the anterior smaller but with rela- 

 tively more robust cusp than posterior, both teeth somewhat crescen- 



