VIVIPAROUS FISHES OF THE PACIFIC COAST. 
397 
18. CYMATOGASTER AGGREGATUS. 
(Plate xcn, Fig. .3, and Plates xciii to cxvm.) 
Cymatogaster aggregatus Gibbons, Proc. Cal. Acad. Nat. Sci., in Daily Placer Times and Tran- 
script, May 18, 1854, fide A. Agassiz; id., Proc. Acad. Nat. Sci. Phila. v. 7, 106; Gill, 
Proc. Acad. Nat. Sci. Phila. 1863, 275; Cooper, in Nat. Wealth Cal. by Cronise, 489, 
1868; Streets, Bull. U. S. N. M., No. 7, 45, 1877; Rosa Smith, A list of the Fishes of San 
Diego, California, Nov., 1880; Jordan & Gilbert, Proc. U. S. N. M. 1880, 456 (Puget Sound 
to San Diego, California) ; Jordan & Jouy, Proc. U. S. N. M. 1881, 10 (Puget Sound, 
Monterey, San Francisco, and Santa Barbara, California); Jordan & Gilbert, Proc. U. 
S. N. M. 1880, 28 (San Diego, California); Eigenmann & Eigenmann, Ann. New York 
Acad. Sci., vi, June, 1892 (San Diego to Puget Sound.) 
Micrometrus aggregatus Gibbons, Proc. Cal. Acad. Nat. Sci. in Daily Placer Times and Tran- 
script, May 30, 1854, fide A. Agassiz; Gibbons, Proc. Acad. Nat. Sci. Phila., v. 7, 125; 
Archiv fiir Naturgeschichte, 21. Jahrg., B. 1, 339, 1885; A. Agassiz, Proc. Boston Soc. 
Nat. Hist., v. 8, 128, 1861; Jordan & Gilbert, Proc. U. S. N. M. 1881, 51 (Puget Sound 
to San Diego, California); Bean, Proc. U. S. N. M. 1881, 265 (Puget Sound, Vancouver 
Island; id., Proc. U. S. N. M. 1883, 361 (Port Simpson, Departure Bay, B. C. ; Port 
Wrangel, Alaska) ; • Jordan & Gilbert, Syn. Fish. N. Am., 590, 1883 (Pacific Coast 
United States); Jordan, Cat. Fish. N. Am., 96, 1885 (name); Rosa Smith, West Am. 
Scientist, 1885, June; Eigenmann, Amer. Nat., March 1889 (Development); Eigenmann 
& Eigenmann, West Am. Scientist, June, 1889. 
Metrogaster aggregatus A. Agassiz, Proc. Boston Soc. Nat. Hist., v. 8, 133, 1861. 
Ditrema aggregatum Giinther, Cat. Fish. Brit. Mus., iv, 248, 1862 (San Francisco, Humboldt 
Bay, Vancouver Island). 
Holconotus rJiodoterus Girard, Proc. Acad. Nat. Sci. Phila. 1854, 141, 152; Girard, Proc. Acad. 
Nat. Sci. Phila. 1855, 322; Girard, Archiv fiir Naturgeschichte, 21. Jahrg., B. 1, p. 350, 
1855; Girard, Pacific R. R. Survey, v. 6, Abbot’s Report, Zoology, 26, 1857 (San Fran- 
cisco Presidio, Humboldt Bay, Astoria, Cape Flattery, San Diego, Puget Sound, 
Shoalwater Bay, Petaluma) ; Girard, Pacific R. R. Survey, v. 10, Fishes, 193, pi. xxxv, 
xxxvi, f. 1-4, xxvi, f. 78, 1859; Girard, Pacific R. R. Survey, v. 10, Whipple’s Report, 
Zoology, 51, 1859 ; Girard, Pacific R. R. Survey, v. 10, Williamson’s Report, Zoology, 
87, 1859. 
Metrogaster lineolatus Agassiz, ms., 1861. 
Sema signifer Jordan, Hayden’s Geol. and Geogr. Survey, vol. iv, No. 2, 1878, 399 (recorded 
from Texas by mistake). 
Habitat : Pacific Coast of United States. 
Body elliptical, elongate, the dorsal outline somewhat more curved than the 
ventral; mouth small, oblique; dorsal spines high, the fifth or sixth spine longest, the 
last shorter than the soft rays ; anal with weak spines ; pectorals reaching a little 
farther than the tips of the ventrals. Head, 3^; depth, 2-§; D. ix, 20; A. hi, 22. 
Color, silvery, back dusky ; middle of sides anteriorly with the scales each with a 
cluster of dark points, these forming a series of longitudinal stripes, which extend to 
opposite the base of the anal; these stripes are interrupted by three vertical light 
yellow bars on which are no black specks in the adult. Adult males in spring almost 
entirely black. 
