HERPESTES— — HESPEROSCIURUS. 321 
Herpestes—Continued. 
Species, 3: Viverra ichneumon Gmelin (type), V. mungo Gmelin, and V. cafra 
Gmelin, from Africa and Asia. 
Herpestes: épmnotns, a creeper—probably in allusion to its habits, especially in 
pursuit of its prey. This is the derivation given by the original deseriber, but 
the following has been suggested: irregularly from é£pz(eróv), a reptile, 
serpent + é6físzrv, to eat, devour. Cf. Spermestes. (Century Dict.) 
Herpetocetus Van BENEDEN, 1872. Cete, Baleenide. 
Bull. Acad. Roy. Sci. de Belgique, 2° sér., XXXIV, 20, 1872. 
Erpetocetus V AN BENEDEN, ibid., L, 25, 1880; Ann. Mus. Roy. Hist. Nat. Belgique, 
VII, 84, 1882. 
Type: Herpetocetus scaldiensis Van Beneden, from Stuyvenberg and St. Nicholas, 
in the vicinity of Antwerp, Belgium. 
Extinct. Based on maxillary bones. 
Herpetocetus: &épzeróv reptile; &?)ros, whale, ‘A cause du talon qui termine la 
mandibule en arriére et qui rappelle ce méme os des reptiles sauriens." (VAN 
BENEDEN. ) 
Herpetomys (subgenus of Microtus) MERRIAM, 1898. — Glires, Murid:e, Microtinee, 
Proc. Biol. Soc. Wash., XII, 107-108, Apr. 30, 1898. 
Type: Microtus guatemalensis Merriam, from Todos Santos, Huehuetenango, 
Guatemala (alt. 10,000 ft. ). 
Herpetomys: Epans, Epmntos, creeper; “0s, mouse—from the animal’s mode of 
progression. 
Herpetotherium Corr, 1873. Marsupialia, Didelphyid:e. 
Palzeont. Bull. No. 16, p. 1, Aug. 20, 1873; Synop. New Vert. Colorado, 4, 1873; 
Ann. Rept. U. S. Geol. & Geog. Surv. Terr., VII, for 1873, 465, 1874. 
Type: Herpetotherium fuzax Cope, from the Oligocene (White River) of Colorado. 
Extinct. Based on ‘‘a left mandibular ramus incomplete at both extremities, 
but exhibiting the crowns and alveoli of five molar teeth.’’ 
Herpetotherium: épmetorv, reptile; §nptor, wild beast. 
Hesperocyon Scorr, 1890. Ferze, Canid:e. 
Princeton College Bull., II, No. 2, pp. 37-38, Apr., 1890. 
Genus described, but no species mentioned: ‘‘ Hesperocyon becomes extremely 
abundant in the John Day beds [Oregon], but does not pass up in the higher 
Miocene. Its nearest European allies are Cynodon and Cynodictis." (Scorr. ) 
Hesperocyon: €67€pos, western; «ocv, dog—in allusion to the type locality. 
Hesperomys WarERHOUSsE, 1839. Glires, Murid:e, Cricetin:e. 
Zool. Voy. H. M. S. ‘Beagle,’ pt. 1, Mamm., 74-77, pl. 12, 1839. 
Type not designated, but Mus bimaculatus Waterhouse, from Maldonado, Uru- 
guay, may perhaps be so considered, since this species is compared with 
Mus rattus in showing the differences between the mice of the New and Old 

World. 
Hesperomys: €6mépos, western; “0s, mouse—i. e., belonging to the western 
hemisphere. 
Hesperoptenus (subgenusof Vesperus) Perers, 1868. Chiroptera, Vespertilionid:e. 
Monatsb. K. Preuss. Akad. Wiss. Berlin, Nov. 1868, 626-627; Dec. 1868, 638-639. 
Type: Vesperus ( Hesperoptenus) dorix Peters, from Sarawak, Borneo. 
Hesperoptenus: £z epos, evening; zr7vóc, winged—i. e., a crespuscular winged 
creature, a bat. 
Hesperosciurus (subgenus of Seiurus) NEtsoN, 1899. Glires, Sciuridze. 
Proc. Wash. Acad. Sci., I, 27, 83, pl. 1, fig. 5, May 9, 1899. 
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