390 The American Naturalist. [April, 
monly accepted ideas, these organs in the Phalangids are to be regarded 
as compound, and further that they are inverse eyes homologous with 
the anterior middle eyes of spiders and the middle eyes of the scor- 
pions. 
The Fishes of the Pacific Coast of America North of 
Cerros Islands.—An important paper recently published is an 
enumeration of the fishes occurring on the Pacific coast of America 
north of Cerros Island, and to a depth of 150 fathoms by C. H. and 
R. S. Eigenmann. The authors have placed the dividing line between 
the littoral and the bathybial faunas of this region at 150 fathoms, 
because all of the genera so far recorded from this depth have repre- 
sentatives in the shallower water. The few littoral genera which have 
representatives in deeper water are added as footnotes. Cerros Island 
is a natural boundary to this region, since south of it few of the char- 
acteristic genera of this region are found. The author’s observations 
show that the old division, at Point Conception, of the northern and 
southern California fauna is incorrect, and that, in reality, no definite 
boundaries can be assigned for a northern and southern fauna. 
The California fauna is distinct from that of Alaska, although four 
of the species found at San Diego are found in Alaska. The Califor- 
nia Fauna is characterized by the abundance of species of Sebastodes, 
of Cottidæ, and of Embiotocidæ. The last are entirely absent from 
Alaska, and only a few species of Sebastodes are found there. The 
boundary between these two regions lies somewhere between Sitka and 
Puget Sound. 
The relative number of species at the principal localities is as fol- 
lows : 
Species. 
The whole of Alaska 108 
Fuget Sound: «acs cnssastccroveaatreassciiy eee a be 107 
Han: PERE OIIOD ioanen a a 156 
Monterey 148 
Santa Barbara 117 
San Pedro 82 
San Diego, including Cortes Banks , 168 
There are known from the entire region 382 species, belonging to 
228 genera. Of these 116 genera, or more than half, are also found 
in the Atlantic Ocean, and 32 species are found both in. the Atlantic 
and in the Pacific. 
