Distribution of the Salmonide. aa 
Asia, and is well-established in North America. The Asiatic spe- 
cies are, for the most part, little known. Most of the species are 
non-migratory and inhabit fresh-water lakes and streams. 
emenate : 
length. Bon non (Oncorhynchus nerka) Wallowa Lake, Oregon, } natural 
In the Eastern Continent, the southern limit of Salmo is in about37° 
North latitude, A single doubtful species—S. macrostigma of Duméril, 
which may be identical with the common fario—was found abundant 
in the Oued-al-Abaich, forty kilometres west of the town of Collo, 
in Northern Algeria. This species was founded on young specimens 
having about eight parr marks. The vomerines are figured as in 
two rows of about seven teeth each, just as in fario, The scales in 
British Museum examples are: 27, 122, 34; pyloric cæca, 28 to 
31; vertebra, 57. Their resemblance to young fario was observed 
by Dr. Giinther. 
Rainbow T p ; 
I rout (Salmo irideus). V , Missouri. About ,4 natural length. 
rr anne by UR Fish Commitee oe ERE s 
en California one species, Salmo irideus, is found as far south as 
e Mexican line, But the most southerly of all our species and of 
