Chromides and Pharyngognathi 383 
in the West Indies and on the west coast of Mexico. Pomacen- 
trus fuscus is the commonest West Indian species, and Pomacen- 
trus rectifrenum the most abundant on the west coast of Mexico, 
the young, of an exquisite sky-blue, crowding the rock pools. 
Pomacentrus of many species, blue, scarlet, black, and golden, 
abound in Polynesia, and no rock pool in the East Indies is: 
without several forms of thistype. The type reaches its greatest. 
development in the south seas. About forty different species of 
Pomacentrus and Glyphtsodon occur in the corals of the harbor 
of Apia in Samoa. 
Almost equally abundant are the species of Glyphisodon. The 
“cockeye pilot,” or jaqueta, Glyphisodon marginatus, green with 
eee 
Fig. 315.—Cockeye Pilot, Glyphisodon marginatus (Bloch). Cuba. 
black bands, swarms in the West Indies, occasionally ranging 
northward, and is equally common on the west coast of Mexico. 
Glyphisodon abdominalis replaces it in Hawaii, and the Asiatic 
Glyphisodon saxatilis is perhaps the parent of both. Glyphisodon 
sordidus banded with pale and with a black ocellus below the 
soft dorsal is very common from Hawaii to the Red Sea, and is 
a food-fish of some importance. Glyphisodon celestinus blue, 
with black bands, abounds in the south seas. 
