566 TELEOSTEI CHAP. 
c. Branchiostegal rays 6 to 10; ventral rays 6 to 8; stomach 
caecal ; pyloric appendages few (2 to 11) or rather numerous. 
Osmerus, Thaleichthys, Mallotus, Plecoglossus, Hypomesus. 
d. Branchiostegal rays 3 or 4; ventral rays 8 to 10; stomach 
eaecal ; pyloric appendages absent. Microstoma, Nansenia, 
Bathylaqus. re 
£. Air-bladder absent; branchiostegal rays 3 to 6; ventral 
rays 6 or 7; stomach siphonal; pyloric appendages absent. 
Retropinna, Salanx. 
Only about 80 species can, at present, be regarded as valid. 
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Fic, 342.—Distribution of Salmonidae (deep-sea forms not included), 
The beauty, gameness, and great economical value of the 
Salmonids have caused more attention to be bestowed on them 
than probably upon any other group of fishes. As Professor 
Smitt tells us, a Swedish proverb says “A dear child has many 
names,’ and this apples well to our Salmon and Trout, the species 
of which have been unduly multiplied by some writers. The genus 
Salmo, characterised by a large mouth and powerful dentition, 
is divided into three sections: Oncorhynchus, Quinnat Salmon, 
of the North Pacific, ascending rivers in North America and Asia, 
with 12 to 17 developed rays in the anal; Salmo, Salmon and 
Trout, with 8 to 12 rays in the anal, and teeth not only on the 
head of the vomer but also along its shaft, at least in the young, 
