VIVIPAROUS FISHES OF THE PACIFIC COAST. 
389 
7. AMPHISTICHUS ARGENTEUS Agassiz. 
Amphistichus argenteus Agassiz, Am. Journ. Science and Arts (2), v. 17, 367, 1854 (California); 
Archiv fur Naturg. 1855, B. 1, 34; Girard, Proc. Acad. Nat. Sci. Phila. 1854, v. 7, 141 and 
153; id., 1. c., 323; id., Archiv. f. Naturg. 1855, B. 1, 352; id., Pacific R. R. Survey, v. 10, 
201, pi. xxxix, 1859 (San Francisco, Presidio); id., I. c., Whipple’s Report. 51, 1859 
(San Francisco); id., 1. c.,' Williamson’s Report, 88, 1859 (San Francisco); Agassiz, Proc. 
Boston Soc. Nat. Hist. 1861, 131; Gill, Proc. Acad. Nat. Sci. Phila. 1862, 275 (Cali- 
fornia); Cooper, in Crouise Nat. Wealth Cal., 489, 1868; Rosa Smith, A List of the Fishes 
of San Diego, Cal., Nov., 1880; Jordan & Gilbert, ihoc. U. S. N. M.1880, 28 (San Diego, 
Cal.) ; Jordan & Gilbert, Proc. U. S. N. M. 1880, 456 (San Francisco to San Diego, Cal.) ; 
Jordan & Jouy, Proc. U. S. N. M. 1881, 10 (Monterey, San Francisco, Santa Barbara, 
Cal. ) ; Jordan & Gilbert, Proc. U. S. N. M. 1881, 50 (Tomales to San Diego, Cal.) ; Jordan 
& Gilbert, Syn. Fish. N. A., 593, 1883 (Califorrfia) ; Jordan, Cat. Fish. N. Am., 96, 1885; 
Rosa Smith, West Am. Scientist, June, 1885 (San Diego); Eigenmann & Eigenmann, 
Ann. N. Y. Acad. Sci., vi, June, 1892 (San Diego to San Francisco). 
Ditrema argenteum Giinther, Cat. Fish. Brit. Mus., iv, 251, 1862 (San Francisco) ; Lord, Naturalist 
in Vancouver Isl. and Brit. Col., i, 120, pi. opposite p. 160, 1866. 
Mytilophagus fasciatus Gibbons, Proc. Acad. Nat. Sci. Phila. 1854, v. 7, 125 (San Francisco); 
id., Archiv f. Naturg., 1855, B. 1, 340. 
Amphistichus heermanni Girard, Proc. Acad. Nat. Sci. Phila. 1854, v. 7, 135. 
Ennichthys heermanni Girard, 1. c., 323; id., Archiv f. Naturgeschichte, 1855, B. 1., 351; id.. 
Pacific R. R. Survey, v. 10, 199, pl.xxxvxn and xxvi, fig. 9, 1859 (Cape Flattery, San 
Francisco); id., 1. c., Williamson’s Report, 88, 1859 (San Francisco). 
Amphistichus similis Girard, Proc. Acad. Nat. Sci. Phila. 1854, v. 7, 153; id., 1. c., 323, 1855; id., 
Archiv f. Naturg. 1855, B. 1, 353; id., Pacific R. R. Survey, 203, pi. xxxvi, fig. 5-9, 1859 
(San Francisco); id., 1. c., Williamson’s Report, 88, 1859 (San Francisco). 
Habitat: San Diego to Cape Flattery. 
Body ovate, the dorsal profile much more curved thau the straightisli ventral 
outline. Mouth slightly oblique, comparatively large. Snout longer than the rather 
small eye. Interorbital region little depressed; maxillaries not included under the 
orbital, reaching to the front of the pupil; lower jaw included. Dorsal spines strong, 
the fifth or sixth longest, not so long as the soft rays; pectorals slightly falcate, reach- 
ing almost to the tips of the ventrals. Head, 3£; depth, 2£; D. x, 24; A. iii, 26; lat. 
1., 67. Color, u silvery; sides with narrow vertical bars of a brassy olive color, alter- 
nating with vertical series of spots of similar color ; fins plain; vertical fins sometimes 
edged with dusky.” A few specimens have been observed in which the sides were 
uniformly brassy. 
6. RHACOCHILUS Agassiz. 
Rhacochilus* Agassiz, Am. .Jouru. Science and Art, (2) v. 17, 867, May, 1854 (toxotes). 
Pachylahrusi Gibbons, Proc. Cal. Acad. Sci. in Daily Placer Times and Transcript, San Fran 
cisco, June 21, 1854. 
Type : Bhacocliilus toxotes Agassiz. 
* Rhacochilus: Pa/cof rag, and ^eZAoc, lip; referring to the slashed lips of the adult. 
+ Pachylahrus : Ila^tf, thick and labrus, lip; a hybrid word alluding to the thickened lips. 
