Fig. 414.—Guavina mapo, Dormitator maculatus (Schneider). Puerto Rico.
Fig. 415.—Vireosa hanæ Jordan & Snyder. Misaki, Japan.
Fig. 416.—Esmeralda de Mar, Gobionellus oceanicus (Pallas). Puerto Rico.
Of the typical gobies having the ventrals united we can mention but a few of the myriad forms, different species being abundant alike in fresh and salt waters in all warm regions. In Europe Gobius jozo, Gobius ophiocephalus, and many others are common species. The typical genus Gobius is known by its united ventrals, and by the presence of silken free rays on the upper part of the pectoral fin. Mapo soporator swarms about coral reefs in both Indies. Gobionellus oceanicus, the 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 ceuthœcus lives in the cavities of sponges. Coryphopterus similis, a small goby, swarms in almost every brook of Japan. The species of Pterogobius 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.
Fig. 417.—Pterogobius daimio Jordan & Snyder. Misaki, Japan.
