. Bulletin of the Bureau of Fisheries. Fisheries; Fish culture. 144 BULLETIN OF THE BUREAtJ OF FISHERIES. 22. Hysterocarpus traskii Gilibuns. Fresh-water Viviparous Perch. Hysterocarpus traskii. Gibbons, Proc. Ac. Nat. Sci. Phila., 1854, p. 105, lagoons of lower Sacramento River. Jordan & Evermann, Fishes N. & Mid. .mer., pt. i, p. 1496.1898. Sargosomus ftut'iatilis Agassiz, MS., .Vlexander .Vgassiz, Proc. Host. Soc. Nat. Hist., vol. viii, ISGl, p. 1301, Sacramento River. Docentrus lucens, Jordan, Bui. U. S. Geol. Surv. vol. iv, 1S7.S, p. Hi;?, Sacramento River, erroneously ascribed t
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. Bulletin of the Bureau of Fisheries. Fisheries; Fish culture. 144 BULLETIN OF THE BUREAtJ OF FISHERIES. 22. Hysterocarpus traskii Gilibuns. Fresh-water Viviparous Perch. Hysterocarpus traskii. Gibbons, Proc. Ac. Nat. Sci. Phila., 1854, p. 105, lagoons of lower Sacramento River. Jordan & Evermann, Fishes N. & Mid. .mer., pt. i, p. 1496.1898. Sargosomus ftut'iatilis Agassiz, MS., .Vlexander .Vgassiz, Proc. Host. Soc. Nat. Hist., vol. viii, ISGl, p. 1301, Sacramento River. Docentrus lucens, Jordan, Bui. U. S. Geol. Surv. vol. iv, 1S7.S, p. Hi;?, Sacramento River, erroneously ascribed to Rio Grande. Body deep and compressed, l.iack strongly arched; mouth small, terminal, jaws even, maxillary not extending to eye; dorsal wi1h al^out xvii spines and 11 soft rays; anal with 3 spines and 23 soft rays. Scales cycloid. Not very abundant, found in sluggish walei-. Readily distinguished from the Sacramento perch or sunfl.sh by the small mouth and cycloid .scales. Local Distribution. Locality. Stream or lake. Collector. Name as reported. Authority. Hysterocarpus traskii Sargosomus fluvia- tilis. n. traskii do do Eigenraan^ & Ulrey. Fresh-water higoons... .. ..do Trask & Morris Rutter & Chamber- lain. .. ..do Gibbons, lS54a, lSS4b. do Newberry Ilenshavv Rutter & Scofleld do do l^, -__j , „-, -„ do do ;«.raiu, .^, -.-, s. United States hatchery do do .do do do do . ..do do do do do do .do do do Jordan & Gilbert. Rutter & Chamber- lain. do do do do do do. Fig. 3, sperrinia, now species. Type. 23. Cottus aspenima Rutter, new species. Head 3.2 to 3.33 in length; depth 5..5; eye 3.5 to 4 in head; snout a little longer than eye; dorsal vi (or v), 18; anal 14; pectoral 14; ventral i, 3; caudal (liranched rays) 7. Body slender, but not par- ticularly compressed, width of caudal peduncle 1.25 to 1.33 in eye, its depth slightly greater than eye; maxillary 2.5 in head, extending to vertical through anterior edge of pupil; profile flat or concave back of e