466 Gobioidei, Discocephali, and Tasniosomi 



river goby, of the Hawaiian streams, and Lentipes stimpsoni is 

 the mountain oopu, capable of clinging to the rocks in the 



FIG. 420. Pond-skipper, Boleophthalmus chinensis (Osbeck). Bay of Tokyo, Japan. 

 (Eye-stalks sunken in preservation.) 



rush of torrents. Paragobiodon echinocephalus is a short thick- 

 set goby with very large head, found in crevices of coral reefs 

 of Polynesia. 



FIG. 421. Mud-skippy, Periophthalmus oarbarus (L.). Mouth of Vaisigono River, 



Apia, Samoa. 



In numerous interesting species the first dorsal fin is wanting 

 or much reduced. The crystal goby, Crystallogobius nilssoni, 

 of Europe is one of this type, with the body translucent. Equally 



