262 



BULLETIN OF THK BUKEAU OK FISHERIES. 



It w;is lli(n-of(iro a groat ]ilcas\ire to lis to liiid I'ainlmw tr'iut in at least twn of the stroams vifited in 1903 — ■ 

 the Nalia Stream at Loring and Klawak River at Klawak. On August 30 Chief Engineer Crater and 

 Paymaster McMiUan caught 13 fine examples in Naha Stream, the largest about 16 inches long and weigh- 

 ing about 2 pounds. On August 26 Dr. Everraann took 2 good ones in Klawak Stream above the 

 lagoon. Mr. Thomjison. the storekeeper at Klawak, reported that he had recently taken in this stream 

 a rainbow trout that was 32 inches long. Mr. II. F. Swift say.s that he caught one in 1878 which weighed 

 8 pounds. He says that he has seen several, each weighing as much as 5 pound.s. 



On August 3, IflOl, Dr. C. St. ,1. Butler and Lieut. Hugh Rodman (l)oththen of the Albatross) caught 

 a numlier of rainliow trout in a stream flowing into Hanas Hay. Chichagof Island, Chatham Strait, 

 near Killisnoo. Mr. J. A. Kerr, of Seattle, informs us that rainbow Inmt are abundant in Powell River 

 at the upper end of Tuxada Island, where they can be taken from ,Iune until late in the fall. About 

 the end of August 110 were caught. He say.s the species occurs also at Thorne Bay. Mr. Chamberlain 

 reports thcni to lie common in Naha Stream near Loring, where he has seen examples 2 feet long. 



During the investigations at Yes Bay in 1005 Mr. Chamljerlain and Mr. Burcham found the rainbow 

 trout qiute abundant, particidarly in the outlet of Lake McDonald. On June 9, 1906. Mr. Sidney Paige, 

 of the U. S. (ieological Survey, forwarded to the Bureau from Knik. Alaska, three .small examples of 

 rainli(.)\v trout wliich luid lieen taken in Cottonwood Creek. This stream enters Knik Arm near its head, 



Fig. ll.—Salmo irideu.s (r.ibbons). 



which is at the head of Cook Inlet, in north latitude about 61° 30'. It is more than probable that the 

 trout photographed at Katatla by Mr. Stone and already referred to in the discussion of the cutthroat 

 trout was a rainbow. 



The above-named localities are, therefore, the only Alaskan localities iii which the rainbow trout is 

 definitely known to occur. There are no records for the Kodiak region, the Aleutian Islands, or any 

 waters in or north of the Alaskan Peninsula. It is quite certain, however, that further investigation 

 will demonstrate its presence in many Alaskan streams in which it is not now known to occur. 



Wlrether the rainliow trout of Alaska is distinct from t\'pical Sahiio irideus (of San Leandro Creek, 

 California) we are not prepared to say, and we provisionally identify oiir specimens with that s])ecies, 

 reserving a final decision until we have more material for comparison. 



A typical example of the Alaska rainbow is no. A272 (4569). 23 inches long, from Lake McDonald, 

 September 7, 1905. It may be described as follows: 



Head 3.8 in length; depth 4.4; eye 6 in head; snout 2.9; maxillary 1.5, long and narrow, extending 

 far beyond orbit; pectoral 1.6; body considerably compressed; head long, conic; snout long and 

 pointed; least depth of caudal peduncle equaling length of snout; tail square, lint slightly forked. 



. Color in alcohol : Entire l;)ody closely covered with very distinct small lilack spots, quite as numerous 

 below lateral line as above; head with relatively few roundish black spots, about 20 or 25 on cheek and 

 opercle; fins all black spotted, the spots less numeroua on pectorals and ventrals; ventrals. anal, and 

 dor.sal lipped with yellowi.sh; middle of side and cheek witli a broad rosy band; no red on throat; 

 scales 134. 



An example 10 inches long from Cottonwood Creek, Knik Arm, is described as follows: 



Head 4.5 in length; depth 4.3; eye 4.75 in head; snout 4.75; maxillary 1.9; scales about 120. 



