1. SALMO. 



151 



1. A southern form (Mingan River), with small head and truncate 

 caudal fin, which appears to be identical with S. fontinalis ; and 



2. A species from Boothia Felix, with small head, and with the 

 caudal fin deeply forked. 



Only one of the two specimens mentioned by Sir J. Richardson 

 appears to have been preserved : it is in the Haslar Collection, and, 

 although no record of its history has been attached to the specimen, 

 it is evidently the example from Mingan River, described by Richard- 

 son, I. c. pp. 174-175. There is no sufficient evidence to show that 

 it belongs to a species distinct from S. fontinalis, although its trun- 

 cated caudal fin distinguishes it at once from the S. hoodii of Boothia 

 Felix. Also another example, which is clearly nothing but a S. fon- 

 tinalis, was presented by Richardson to the British Museum as S. 

 hoodii. 



Richardson says that S. hoodii is distinguished by a very short 

 head, the length of which is one-sixth of the total length. We do 

 not know Avhether this is really a specific character, or whether the 

 author had accidentally some small-headed individuals for examina- 

 tion, perhaps females. Therefore we do not think we should be 

 justified in specifically separating two specimens before us which 

 agree with S. hoodii of Boothia Felix in all particulars, especially in 

 the deeply forked caudal fin, but have the head considerably larger, 

 viz. one-fifth of the total length. 



B. 12. D. 11. A. 10. L. lat. 185*. 

 Body somewhat elongate. MaxUlary rather strong, straight, ex- 

 tending to, or somewhat behind, the vertical from the hind margin of 

 the eye. Praeoperculimi very short in a longitudinal direction, with 



* This always indicates the number of transverse series of scales above the 

 lateral line. 



