PERODICTICUS—-PESIOCETUS. 59b 
Perodicticus— Continued. 
Type: Perodicticus geoffroyi Bennett (=Nycticebus potto Geoffroy), from Sierra 
Leone, West Africa. 
Perodicticus: mnpos, maimed; 6ez«rz«os, serving to point out—so called from the 
rudimentary index finger. 
Perodipus Firzincrer, 1867. Glires, Heteromyidee. 
Sitzungsber. Math.-Nat. Cl. K. Akad. Wiss., Wien, LVI, 126, 1867; MERRIAM, 
Proc. Biol. Soc. Wash., VII, 26 footnote, 1892 (name revived ). 
Type: Dipodomys agilis Gambel, from Los Angeles, California. 
Perodipus: anpa, pouch; + Dipus—in allusion to the external cheek pouches. 
Peroéchinus FrrziNGER, 1866. Insectivora, Erinaceide. 
Sitzungsber. Math.-Nat. Cl. K. Akad. Wiss., Wien, LIV, Abth. 1, 565, 1866; 
LVI, Abth. 1, 856, 1867. 
Type: Hrinaceus pruneri Wagner, from Kordofan, northeast Africa. 
Peroéchinus: z5pós, maimed; 2yivoc, hedgehog. 
Perognathus MaxiwiL1AN, 1839. Glires, Heteromyidee. 
Reise Innere Nord-America, I, 449—450, 1859; Nova Acta Acad. Cis. Leop.-Carol. 
Nat. Cur., XIX, 368-374, pl. xxxiv, 1839; Merriam, N. Am. Fauna, No. 1, p. 2, 
Oct. 25, 1889. 
Type: Perognathus fasciatus Maximilian, from Fort Union (now Fort Buford), 
North Dakota. 
Perognathus: mHpa, pouch; »váos, jaw—irom the external cheek pouches. 
Perolestes (see Peralestes ). Marsupialia, Triconodontid:e. 
Peromeles (see Perameles). Marsupialia, Peramelidee. 
Peromys (see Peramus). Marsupialia, Amphitheriid:e. 
Peromyscus GrocER, 1841. Glires, Muridee, Cricetinze. 
<4) 
Nat. Hist., 6th ser., XV, 190, 192, Feb. 1, 1895. 
Type: Peromyscus arboreus Gloger ( — Cricetus myoides Gapper), from Lake Sim- 
coe, Ontario, Canada. 
Peromyscus: mapa, pouch; 406xos, little mouse—from the small cheek pouches 
somewhat resembling those of Cricetus. 
Hand- u. Hilfsbuch Naturgesch., I, pp. xxx, 95, 1841; Tuomas, Ann. & Mag. 
Peronymus (subgenus of Peropteryr) PETERS, 1868. Chiroptera, Noctilionidee. 
Monatsber. K. Preuss. Akad. Wiss., Berlin, 1868, 145; Donson, Cat. Chiroptera 
Brit. Mus., 374, 1878 (in synonymy). 
Type: Peropteryx ( Peronymus) leucoptera Peters, from Surinam. 
Peronymus: anp@®vvj.os, named after a wallet—from the ears which are united 
across the face by a low band, and the attachment of the wings to the feet. 
Peropteryx PETERS, 1867. Chiroptera, Noctilionid:e. 
Monatsber. K. Preuss. Akad. Wiss., Berlin, July, 1867, 472-474; MirrLER & Renn, 
Proc. Boston Soc. Nat. Hist., XXX, 269, Dec., 1901 (type fixed). 
Species, 4: Vespertilio caninus Maximilian (type), and Proboscidea villosa Gervais, 
from eastern Brazil; and Peropteryx kappleri Peters, and P. leucoptera Peters, 
from Surinam. 
Peropteryx: mHpa, pouch; zréové, wing—from the wing-sac, developed only in 
the male, which opens outward near the anterior margin of the antebrachial 
membrane. 
Perotherium (see Peratherium). Marsupialia, Didelphyid:e. 
Perriemys (sce Perieromys). Glires, Theridomyide. 
Pervatherium (see Pernatherium). Ungulata, Ancylopoda, Chalicotheriide. 
Pesiocetus (see Plesiocetus). Cete, Balzenidee. 
