ÖEVERSIGT AF K. YETENSK.-AKAD. FÖRHANDLINGAR 1899, N:0 6. 553 



the base of the second dorsal fin less 

 tlian 22?^ of the length of the body: 

 — Lophogobius, GiLL. 

 ßßß: Length of the dorsal margin of the 

 caudal peduncle less than 17 % of the 

 length of the body and less than two 

 times the least height of the tail; 

 length of the base of the second dorsal 

 fin more than 22 % of the length of the 

 body. — Porogobius, Blkr. 

 /:^/5: Length of the ventral fin less than So% of 

 the distance between the tip of the nose 

 and the origin of the anal fin. — Acentro- 

 gobius, Blkr. (= Ctenogobius, Blkr.? nec. 

 GiLL.); group of the caniniis-tjTpe. 

 bb: Least height of the tail less than QO % of the length of the 

 base of the anal fin. 



a: Least depth of the tail niore than 7.5% of the length of 

 the body (without caudal fin). 



aa: Cheek (distance from the hind end of the maxiJlary 

 to the hind margin of the preopercle) shorter than 

 the postorbital part of the head. Coryphopteriis, 

 GiLL. (?). 



aaa: Niiraber of scales in a transverse row between 

 the origins of the second dorsal and anal fins 

 more than 8. 



aaaa: Length of the base of the second dorsal 

 fin more than 22 % of the length of the 

 body (without caudal fin). — Gobius 

 criniger, CuY., Val. Black Sea (?), one 

 specimen in the Mus. Acad. Petersburg, 

 taken by Rådde. 

 ßßßß: Length of the base of the second dorsal 

 fin less than 22 % of the length of the 

 body. — Gobius flavescens, Fabr. 



