162 SALMONID^, 



smallor size and with the ovaries as yet imperfectly developed. In 

 the rivers of Kanitsehutka they do not arrive till after Sahno li/caodon 

 and orientalis ; and then more perfect specimens of iS. la(joc('phahis are 

 observed in great numbers again ascending the river Itscha. How- 

 ever, it is said that aU, after the deposition of their eggs and milt, 

 gradually perish in the rivers and do not return to the sea. 



Suhcttha, a migratory Trout from the Amur, 

 Pall. Zoogr. Eoss.-As. iii. p. 382. 

 " In the rivers near the Amur sending their waters into the North 

 Pacific Ocean, there is found a fish called by the Russians in those 

 parts Suhatka (i. e. Dentex), which is as yet very little known, as it 

 is seldom caught ; and a fresh specimen has never yet been brought 

 to me. From the accoimts I have received of it from others, and 

 from a dried head which was brought to me, it seems to be a species 

 of migratory Salmon-Trout. Snout long, pointed, cui'ved ; jaws 

 toothed, with the two anterior teeth on each side larger than the 

 others, curved, nearly one inch long. It is asserted to be one eU 

 in length, somewhat comjwessed, broad, 1| span in breadth, with 

 the back towards the head gibbons, towards the tail attenuated; 

 with small scales, the colour being obscurely bluish ; the same on 

 the fins ; caudal fin broad, compressed beneath. The ovary in this 

 specimen was filled with large ova, of a very agreeable flavour ; and 

 the flesh is also pleasant to the taste. It appears in autumn in the 

 river (which is then already becoming frozen), and is taken moi-e 

 rarely at the mouths of the rivers Derbul and Chaul in Argunum. 

 However, it is said to be more plentiful at the mouth of the river 

 Uro." {Pallas). 



Suckley, Ann. Lye. Nat. Hist. 1851, has named several examples 

 in a bad state of preservation from North-western America ; but the 

 characters assigned to his species are so vague that it is sufiicient to 

 enumerate the names : — 



1. Sahno canis, 1. c. 1858, p. 9, & 1861, p. 312 ; Nat. Hist. "Wash, 

 Terr. Zool. p. 341.— Puget Sound. 



2. Sahno gibber, 1. c. 1858, p. 6. — Puget Sound ; Vancouver's 

 Island*. 



3. Sahno conflmntus, 1. c. 1858, p. 8 ; Nat. Hist. Wash. Terr. Zool. 

 p. 334. — Fort Steilacoom. 



4. Salmo cooperi, 1. c. 1861, p. 311. — Columbia Eiver. 



3. BRACHYMYSTAX. 



Body covered with very small scales. Cleft of the mouth of 

 moderate width ; maxillary broad, rather short, extending to below 

 the anterior part of the eye in the adult fish ; upper jaw rather 

 longer than the lower. Teeth rather feeble ; vomer with teeth ante- 

 riorly only. Dorsal and anal short. Pyloric appendages ? Ova small. 



Siberian rivers. 



* Identified with S. profeus (Pall") in Nat. Hist. Wash. Terr. Zool. p. 339. 



