572 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxiv. 
dark. A thii-d specimen, obtained in salt at Aomori, came from the 
Ishikari River at Sapporo in Hokkaido. We have also young examples 
said to have been taken in the Daiya River at Nikko. The species is 
thus far known only from the island of Hokkaido, from the neighbor- 
ing shores of the province of Aomori, and from the Daiya River. 
The Japanese fishermen fail to distinguish the smaller salmon 
{nutsou, kisitteli) from the adult of the Japanese trout (Salmo perri/i), 
calling them all alike Masu, in opposition to the large salmon 0. keta, 
Fig. 1.— Oncorhynchus masou. 
called Scd'e, and the young trout, which are called Yamabe. This 
confusion extends to some of the published writings. The different 
species are, however, correctlj^ distinguished by Hilgendorf. In his 
account of 0. yessoemis Hilgendorf, however, counts 133 to 137 scales 
in the lateral line. This leaves some doubt as to the specimen he 
had in hand. He finds also 16 dorsal rays, doubtless including the 
rudiments. 
{masu the Japanese name of small salmon; yeso is the old name of 
the great island now called Hokkaido, or " North Shore.") 
2. ONCORHYNCHUS KETA (Walbaum). 
SAKE; DOG SALMON; CALICO SALMON. 
Salmo keta rel kayJco Walbaum, Artedi Piscium, 1792, jx 72; Rivers of Kam- 
chatka; after the Keta or Kayko of Pennant and Krascheninnikow. 
Oncorhynchus keta Jordan and Gilbert, Synopsis, 1883, p. 305. 
Salmo lagocephalus Pallas, Zoogr. Ross.-Asiatica, III, 1811, p. 372; Bering Sea. 
Oncorhynchtis lagocephalus GviiT-RER, Cat., VI, 1866, p. 161. 
Salmo japonensis Pallas, Zoogr. Ross.-Asiatica, III, 1811, p. 382; Knrile 
Islands; Amur River. 
Salmo dermatmus Richardson, Voyage Herald, Zool., 1854, p. 167; Yukon 
River. 
Salmo consuetus Rich ARDSo-s, Voyage Herald, Zool., 1854, p. 168; Yukon River. 
Salmo canis Suckley, Ann. Lye. Nat. Hist. N. Y., 1858, p. 9; and Monogr. Salmo, 
1861, p. 101 (1874); Puget Sound.— Jordan and I^vermanx, Fish. N. and M. 
Amer., I, 1896, p. 478; San Francisco; Kamchatka; Bering Straits. 
Oncorhynchvs haheri Hilgendorf, Monatsber., Ges. Ost-Asien, XI, 1876, p. 25; 
Hokkaido.— IsHiKAWA, Prel. Cat., 1897, p. 20; Nishibetsu R., Yechigo, 
Matsushiro, Shinshin. 
Head 4; depth 4; D. 9; A. 13 or U; scales about 28-150-30; B. 13 
or l-l, rather broad; gill rakers 9+15; pyloric caeca 140-185. General 
