574 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxiv. 
in all respects less A^aluable than in any of the other species of Onco- 
rhynchvff. The introduction of better species to the Japanese rivers is 
a matter of great economic importance. 
{Keta, a vernacular name in Kamchatka.) 
3. ONCORHYNCHUS KISUTCH (Walbaum.) 
GINMASU, SILVER SALMON, KISUTCH. 
? Salmo milktschiich Walbaum, Artedi Piacium, 1792, p. 70; Bering Sea; after 
Milktschutsch or Milktschitsch of Pennant and Krascheninnikow; probably the 
young of kisutch. 
Salmo kisutch Walbaum, Artedi Piseium, 1792, p. 70; rivers and lakes of Kam- 
chatka; after the Kisutdi. of Pennant. 
? Salmo striata Bloch and Schneider, Syst. lehth., 1801, p. 407; Kamchatka; 
after Milktschitsch of Krascheninnikow. 
Salmo kysutch Bloch and Schneider, Syst. Ichth., 1801, p. 407; Kamchatka; 
after Pennant. 
Salmo sanguinolenius Pallas, Zoogr. Ross.-Asiat, III, 1811, p. 379; Bering Sea. 
Salmo tsuppitch Richardson, Fauna Bor.-Amer., Ill, 1836, p. 224; Columbia 
River.— GtJNTHER, Cat., VI, 1866, p. 118. 
Oncorhynchns lycaodon GtJNTHER, Cat., VI, 1866, p. 155; in part. 
Salmo scouleri '&VCKVEY , Monogr. Salmo, 1861 (1874), p. 94. 
Oncorhynchus sanguinolenius GtJNTHER, Cat., VI, 1866, p. 160. 
Oncorhynchus tsuppitch Jordan, Forest and Stream, Sept. 16, 1880, p. 130. 
Oncorhynchus kisutch Jordan and Gilbert, Synopsis, 1883, p. 307. — Jordan and 
EvERMANN, Fish N. and M. Amer., 1896, p. 480. 
Oncorhynchus perryi Hilgendorf, Monatsb. Ges. Ostasien, 1876, p. 25 (not Salmo 
perryi Brevoort). — Ishikawa, Prel. Cat., 1897, p. 20; Arikawa, Toshima, 
Hakodate, Matsushiro, Shinshin. 
Head 4; depth 4; B. 13 or 14; pyloric ca^ca very few and large, 63 
(45 to 80); gill rakers 10 + 13, rather long and slender, nearly as long- 
as eye, toothed; scales 25-127-29; D. 10; A. 13 or 14 (developed rays). 
Bod}^ rather elongate, compressed. Head short, exactly conical, ter- 
minating in a bluntly pointed snout, which is longer and broader than 
the lower jaw; head shorter than in a young quinnat {tschavjytscha) of 
the same size. Interorbital space broad and strongly convex; opercle 
and preopercle strongly convex behind; the preopercle very broad, 
with the lower limb little developed; cheeks broad. Eye quite small, 
much smaller than in young quinnat of the same size. Suborbital 
very narrow, with a row of mucous pores along its surface; maxillary 
slender and narrow, but extending somewhat beyond the eye. Teeth 
very few and small, only 2 or 3 on the vomer; those on tongue 
very feeble; fins small; pectorals and ventrals short, the ventral 
appendage three-fifths the length of the fin; caudal strongly forked, 
on a slender peduncle. Bluish green, sides silvery, with dark punctu- 
lations; dorsal always tipped with black; this color usually conspicuous 
both in the adult and the young; no spots, except a few rather obscure 
on top of head, back, dorsal fin, adipose fin, and the rudimentary upper 
rays of the caudal; rest of the caudal fin unspotted; pectorals dusky 
