VIVIPAROUS FISHES OF THE PACIFIC COAST. 
399 
20. ABEONA AURORA Jordan & Gilbert. 
Abeona aurora Jordan &- Gilbert, Proc. U. S. N. M. 1880, 299 (Monterey, Cal.) ; Jordan & 
Gilbert, Proe-tf. S. N. M.1880, 456 (San Francisco, Cal.); Jordan & Jouy, Proc. U. S. N. 
M. 1881,, 10 (Monterey, San Francisco, Cal.) ; Jordan & Gilbert, Proc. U. S. N. M. 1881, 51 
( Monterey Bay. Cal.); Jordan & Gilbert, Syn. Fish. N. A., 588, 1883 (Monterey Bay); 
Jordan, Cat. Fish. N. A., 96, 1885; Eigenmann & Eigenmann, New York Acad. Sci., vi, 
June, 1892 (Monterey to San Francisco). 
Habitat: Montere” Bay. 
HYSTEROCARPIN/E. 
Hysterocarpinm Gill, Proc. Acad. Nat. Sci. Phila. 1862, v. 14, 275. 
14. HYSTEROCARPUS.* 
Hysterocarpus Gibbons, Proc. California Acad. Nat. Sci., in Daily Placer Times and Transcript, 
San Francisco, May 18, 1854 ( fide A. Agassiz). 
Hysterocarpus Gibbons, Proc. Acad. Nat. Sci. Phila., v. 7, 124, July, 1854. 
Hysterocarpus Girard, Expl. and Surv. for R. R. Route to Pacific, v. 10, Fishes, 190, 1858. 
Hysterocarpus Gunther, Cat Fishes in Brit. Mus., iv, 251, 1862. 
Sargosomus \ Agassiz, mss. {fide A. Agassiz). ( traskii .) 
Dacentrus Jordan, Bull. U. S. Geol. Surv., 1878, 667 ( lucens ). 
21. HYSTEROCARPUS TRASKII Gibbons. 
Hysterocarpus traskii Gibbons, Proc. Acad. Nat. Sci. Phila., v. 7, 105, 1854; Gibbons, Proc. 
Acad. Nat. Sci. Phila., v. 7, 124; Archivfiir Naturgeschichte, 21. Jahrg., B. 1, 336, 1855; 
Girard, Proc. Acad. Nat. Sci. Phila., v. 8, 136, 1854; Girard, Expl. and Surv. for R. R. 
Route to Pacific, v. 6, Abbot’s Report, Zoology, 26, 1857 ; Girard, Expl. and Surv. for 
R. R. Route to Pacific, v. 10, Fishes, 190, pi. xxvx, f. 14, 1858; A. Agassiz, Proc. Boston 
Soc. Nat. Hist., v. 8, 130, 1861 ; Gunther, Cat. Fishes Brit. Mus., iv, 251, 1862; Cooper, 
Nat. Wealth Cal. by Cronise, 489, 1868; Jordan & Jouy, Proc. U. S. N. M. 1881, 10 
(Sacramento River, California) ; Jordan & Gilbert, Proc. U. S. N. M. 1881, 51 (Sacra- 
mento and San Joaquin rivers to San Luis Obispo, California) ; Eigenmann, Ann. Report 
State Fish Comm. California, 1890; Ann. New York Acad. Sci., vi, June 1891 (Sacra- 
mento Valley). 
Sargosomus fluviatilis Agassiz, mss., 1861 ( fide A. Agassiz). 
Dacentrus lucens Jordan, Bull. U. S. Geol. Surv., 1878, 667. 
Habitat: California (Sacramento River in fresh water). 
Body ovate, dorsal outline strongly convex; head small, snout bluntly conic; 
mouth small, oblique, maxillary not reaching the orbit, lower jaw included. Spinous 
dorsal long, the fifth or sixth spine highest, thence gradually lower each way, the 
last spines shorter than the soft rays; anal spines strong and curved. Head, 3J; 
depth, 2. D. xvi, 11; A. hi, 22; Lat. line, 40. 
* Hysterocarpus : 'Yorepa, the womb, and Kapirbr, fruit. 
t Sargosomus: Sargus. the Latin name of a Mediterranean sparoid, allied to the slieepshead 
( S . ovis ), and auga, body, alluding to a superficial resemblance of the embiotocoid to the sparoid genus. 
