462 Gobioidei, Discocephali, and Tzniosomi 
esmeralda or emerald-fish, is notable for its slender body 
and the green spot over its tongue. Gobiosoma alepidotum 
and other species are scaleless. Barbulifer ceuthwcus lives in 
the cavities of sponges. Coryphopterus similis, a small goby, 
swarms in almost every brook of Japan. The species of Piero- 
Fig. 417.—Pterogobius daimio Jordan & Snyder. Misaki, Japan. 
gobius are beautifully colored, banded with white or black, or 
striped with red or blue. Pterogobius virgo and Pterogobius 
daimio of Japan are the most attractive species. Species of 
Cryptocentrus are also very prettily colored. 
Of the species burrowing in mud the most interesting is 
the long-jawed goby, Gullichthys mirabilis. In this species 
Fic. 41S —Darter Goby, Aboma etheostoma Jordan. Mazatlan, Mex. 
the upper jaw is greatly prolonged, longer than the head, as in 
Opisthognathus and Neoclinus. In the ‘‘ American Naturalist”’ 
for August, 1877, Mr. W. N. Lockington says of the long- 
jawed goby: 
“T call it the long-jawed goby, as its chief peculiarity con- 
sists in its tremendous length of jaw. A garpike has a long jaw, 
and so has an alligator, and it is not unlikely that the title will 
call up in the minds of some who read this the idea of a terrible 
