Gobioidei, Discocephali, and Tasniosomi 46 1 



Of the typical gobies having the ventrals united we can 

 mention but a few of the myriad forms, different species being 



FIG. 414. Guavina mapo, Dormitator maculatus (Schneider). Puerto Rico. 



abundant alike in fresh and salt waters in all warm regions. 

 In Europe Gobius jozo, Gobius ophiocephalus, and many others 



FIG. 415. Vireosa hance Jordan & Snyder. Misaki, Japan. 



are common species. The typical genus Gobius is known by 

 its united ventrals, and by the presence of silken free rays on 



FIG. 416. Esmeralda de Mar, Gobionellus oceanicus (Pallas). Puerto Rico. 



the upper part of the pectoral fin. Mapo sopor ator swarms 

 about coral reefs in both Indies. Gobionellus oceanicus, the 



