•NO. 1514. REVIEW OF THE BAT GENUS HEMIDERMA—HAHN. 105 



in cranial and dental characters. Two .skulls from Maranhao, Brazil 

 (Cat. Nos. 104575 and 104578, U.S.N.M.), differ so much in size and 

 proportions that I should be inclined to regard them as belonging to 

 different species if there were not intermediate specimens which bridge 

 the difference. 



NOMENCLATURE. 



The following generic and specitic names, have neen used: 



GENERIC NAMES. 



Yespertilio Linna?us, Syst. Nat., 10th ed., p. 31. Li nnanis included 

 perspicillatum in the genus Yespertilio in common with all other bats. 



Phyllostoma Lacepede, Tabl. Divis. Sous divis. Ordres et Genres 

 Mamm., 1799, p. 16. This genus was established for certain of the 

 leaf-nosed bats, and Hemiderma was at first included in it. 



Carollla Gray, Mag. Zool. and Bot., II, 1838, p. 488. Gray con- 

 stituted this genus for the reception of '''"Carollla hraziliensh'''' and 

 '"''Phyllostoma hrachyotam Pr. Max.'' It has been generally assumed 

 that C. In'asilieiis is and P.ltracltyotnin are .sj^nonyms. Gra3% however, 

 applied the name hra.ziliensis in manuscript to a species of the genus 

 Tonatia^ probably basing it on the same specimen that C. hraziliensis 

 was founded upon, and as it is the first-named species it appears that 

 Carollla should rather be considered a synonym of Tonatia. How- 

 ever, the question does not affect nomenclature as Carollla is pre- 

 occupied by Carolla"' Cantraine, a genus of Mollusca. 



Hemiderma Gervais, Exped. du Comte de Castlenau, Zoologie, p. 43, 

 1855. This name was proposed with Hem I derma hrevleaudum Wied 

 {=^11. persplcillattnit) as the type. Although Gervais figures the 

 skull of a specimen from Bahia with complete zygomatic arches, his 

 description is otherwise correct and applicable to this species and 

 Hemiderma must stand as the valid name of the genus. 



Rhmops Gray, Proc. Zool. Soc, Loud., 1866, p. 115. In this 

 instance, as in many others, Gray failed to distinguish between generic 

 and specific characters in his diagnosis and the description is in itself 

 not determinable. Dobson, however, pronounced the type-specimen 

 of Rhinops minor ^ which was made the basis of the genus, to be Carollla 

 hrevicauda {=H. perspwUlatum). This opinion has been confirmed 

 by Mr. Gerrit S. Miller, jr., who has kindly reexamined the specimen 

 for me. 



SPECIFIC NAMES. 



persplclUatum {Yespertilio) Linna?us, Syst. Nat., 10th ed., p. 31. 

 This is the valid name for the South American form. 



hreviGaudum{He7nide7'm.a)W\e,di^ Schinz'of Thierreich, 1, 1821, p. 164. 

 This name was in current use for the South American species (and 



« I follow current ui^age in considerinsr CnroUia and Carolia to be the same name. 



