OF GENERA 
Peralestes Owen. (Geol. Record, p. 291. ) 
1877. Mamm. 
Feramus Owen. (Geol. Record, p. 291.) 
1877. Mamm. 
Ferarthrus Le Conte. Journ. Acad. Nat. 
Sc. Philad., [2], ii, p. 101. 1852. Col., 
Ceramb. Le Conte , Waterhouse. 
Feraspalax Owen. (Geol. Record, p. 
291.) 1877. Mamm. 
Feratochaetus Rondani. 1856. Dipt., 
Muse., Geom. Verrall. 
Peratochetus Rondani. ( = Peratochae- 
tus Rondani.) 1868. Dipt., Muse., 
Geom. Verrall. 
Peratoptera Gray. Syn. Brit. Mus., p. 
92. nepaq, finis; nrepov, ala. 1842. 
Moll., Cepb. 
Fercesoces Cope. Proc. Amer. Phil. 
Soc., 1870, p. 456. 1870. Pisces, Phys. 
Cope. 
Percidi Bonaparte. Fauna Ital., iii. 
Perea. 1841. Pisces. Agassiz. 
Percnomatia Loew. 1867. Dipt., Muse., 
Ortal. (cf. Perenomatia. ) Verrall. 
Percnoptera Philippi. 1873. Dipt., 
Muse., Tryp. Verrall. 
Percoides Croizet. Pisces. 
Percoides Smith. Fish. Mass. Perea. 
1833. Pisces. Agassiz. 
Per comorphi Cope. Proc. Amer. Phil. 
Soc., 1870, p. 456. 1870. Pisces, 
Phys. Cope. 
Pereionotus Bate and Westwood. 
Sessile-eyed Crust. , i, p. 226. 1861- , 62. 
Crust. Smith. 
Perenethis Koch. Araelin. Australiens, 
p. 980. 7 rypog, mutilus ; vrjO'iq, textrix. 
1878. Aracbn. Araneid. Koch. 
Perenocera (Curtis) Walker. ( = Pe- 
ronocera Curtis, 1836.) 1856. Dipt., 
Limnob. Verrall. 
Perenomatia Loew. Monogr. Dipt. N. 
Amer., iii, p. 93. 1879. Dipt., Ortal. 
Bigot. 
Perforata Edwards and H aime. Brit. 
Foss. Cor., i. 1850. Polypi. Ag- 
assiz. • 
Perforella Rafinesque. Anal. Nat. , 1815, 
p. 144. 1815. Moll., Gast. 
Feriacanthus Bittner. Denkschr. Akad. 
Wiss., xxxiv. 1875. Crust. Dalton. 
Periarchus Conrad. Smiths. Inst. In- 
vert. Foss., p. 21. (Tj^pe Mortonia 
altus Conrad, 1. c.) 1866. Echin., 
Echinoid. Dali. 
IN ZOOLOGY. 253 
Periaster D’Orbigny. Pal. Fiang. Crdt., 
vi, p. 269. 1854. Ech. 
Peribea Rafinesque. Anal. Nat., 1815, 
p. 142. 1815. Moll., Gast. 
Peribleptus Schoniierr. Gen. Cure., 
vii, ii, p. 192. 1843. Col. 
Peribos Lydekker. Palaeont. Indica, 
[10], i, p. 141. 1878. Mamm., Boy. 
Bye. 
Peiibrissus Pomel. Introduc. aux Echin. 
1869. Ech. 
Perichaeta Rondani. ( = Pericheta. ) 
1859. Dipt., Muse., Tach. Ver- 
rall. 
Ferichares Scudder. Rep. Peab. Acad. 
Sc., iv, p. 81. 7r epixapgg. 1872. Lep., 
Urb. Scudder. 
Pericompsus Le Conte. Ann. Lyc. Nat. 
Hist. N. Y., v, p. 191. ( = Pericamp- 
sus Marsch. Nomen.) 1852. Col., 
Carab. Le Conte, Waterhouse. 
Pericosmus Agassiz. Cat. Rais. Echin. 
7r ept, circum ; uoopoq, ornamentum. ( == 
Hemiaster.) 1847. Ech., Spatangoid. 
Agassiz. 
Peridiolithus Hupsch. Neue Entdeck. 
Ttr/pidiov, perula; Yc&oq, lapis. 1768. 
Moll., Brach. 
Ferieria Tapparone-Canefri. Compt. 
rend. Acad. Sc. Paris, lxxxvi, p. 1150. 
1879. Moll. 
Perillus Stal. Ofv. Yet. Akad. Fdrh., 
1867, no. 7, p. 469, in table. 1867. 
Hem., Asop. 
Perimecus Stephens. ( = Perimeces Ag- 
ass. Nomen.) Col. 
Perimegatoma Horn. Trans. Amer. 
Ent. Soc., v, p. 135. n ept, circa; 
Megatoma, nom. gen. 1875. Col. 
Horn. 
Perinaenia Butler. Ann. Mag. Nat. 
Iiist., [5], i, p. 289. 1878. Lep. 
Kirby. 
Perinatus Desmarest MSS. Teste Ag- 
assiz, Mem. Mus. Comp. Zool., iii, p. 
195. Ech. 
Periogiella Monterorato. Giorn. Sc. 
Nat. Econ. Palermo, xiii, p. 87. 1878. 
Moll., Gast. 
Periodon Rafinesque. Anal. Nat. , 1815, 
p. 143. 1815. Moll., Gast. 
Periorges Sciionherr. Gen. Cure., viii, 
ii, p. 420. 7 tepiopyyg, iratus. ( = Pe- 
riorgetes Agass. Nomen.) 1845. Col., 
Cure. 
