256 FISHES. 



In Tmiridea^ the prickles are much less numerous, 

 but are longer and stiflFer. The coloration and form of 

 the body are essentially the same in Cottopsis and Pota- 

 mocottus^ in ToMridea., quite different. Perhaps these 

 three genera should all rather be considered as sub- 

 generic sections of Uranidea. 



3. TRIG LOPS IS, Girard. Lake Sculpins. 

 = Ptyonotus^ Giinther. 



1. T. thompsoni, Grd. Deep Water Lake Sculpin. 

 Body elongate; depth 7 in total length; head 3^; eyes 

 very large, 4 in head; D. VI — 18; A. 15. Great Lakes 

 (L. Ontario, L. Michigan) in deep water; till lately 

 known only from remains found in the stomachs of Lake 

 Trout and I^ing. i 



FAMILY XCVL— GOBIID^. 



{The Gobies.) 

 Body elongated, low, naked or scaly; dorsals two, 

 sometimes united, the spines flexible and less developed 

 than the soft rays; anal similar to soft dorsal ; ventrals 

 1, 5 (rarely 1, 4), sometimes united, forming a disk; gill 

 openings narrow; teeth generally small; a prominent 

 papilla near the vent, as in the Blennies; air bladder 

 usually wanting; no pyloric appendages. Genera thirty; 

 species three hundred and twenty-five. Of the seas of 

 temperate and tropical regions, found on the bottoms 

 near the shore. A few species inhabit both salt and 

 fresh water. 

 * Body naked ; ventrals united. . . . Gobtosoma, 1. 



1 Note. — The number of species of fresh water Cottoids as here 

 given is much too great, as not more than seven of them are 

 certainly distinguishable. The current genera might with little 

 violence be all reunited to Gottus. 



