SAIiMONID^. — OV. 271 



variations due to age, sex and food are very great, and 

 have led to the establishment of a great number of nomi- 

 nal species in all the leading genera, particularly in 

 Salmo. 



* Jaws with evident teeth. 



t Dorsal moderate, of less than 30 rays; teeth strong, on jaws, 

 vomer and tongue. 

 X Scales small, often imbedded in the skin; lat. 1. 100 or 



more SAiiMO, 1. 



XX Scales moderate, deciduous, not imbedded; lat. 1. 60 to 70. 



OSMBRUS, 3. 



ff Dorsal very high of 30 or more rays ; teeth small. 



THTMAIinS, 3. 



** Teeth wanting or reduced to slight roughnesses ; scales rather 

 large, loose Coreoonus, 4. 



/. SALMO, Linnaeus. Salmons. 

 J^" For Revision of this group see Addenda, page 355. 



* Anadromous species, running up from the sea into fresh water 



to spawn ; the young remaining there for a time, then return- 

 ing to the sea where they remain except during the season 

 of reproduction; upper jaw in males moderately if at all 

 hooked. (Sahno.) 



1. S. salar, L. Geeat Sea Salmo^t. No red spots; 

 young (known as Parr^ or SmoU) with dusky cross bars; 

 males in the spawning season with the lower jaw strongly 

 recurved and hooked; body covered with black and red 

 patches; others silvery, with small black dots; eleven or 

 twelve scales in a transverse series from behind the adi- 

 pose fin obliquely forward to the lateral line; D. 14; A. 

 11; lat. 1. 130. Northern Europe and America, S. to 

 Cape Cod. 



2. S. quinnaf, Richi. Columbia Rivbb Salmon, known 



