514 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.42. 



CTENOGOBIUS ABEI Jordan and Snyder. 



Five specimens, males and females, 30 to 40 millimeters long, are 

 identified with C. ahei. They are like the typical examples in all 

 details of structure except that the dorsal spines are not filamentous. 

 They differ somewhat in color, the bands of the body being less regu- 

 lar, the stripes of the caudal peduncle interrupted and inconspicuous, 

 and the black spot on the spinous dorsal somewhat less distinct. 



The species seems to be closely related to Ctenogohius (Vaimosa) 

 fonUnalis,^ which has the opercles partly scaled, the genus Vaimosa 

 being synonymous with Mugilogohius Smitt, of wliich C. ahei is said to 

 be the type.^ It may be remarked that of 20 cotypes of C. fontinalis 

 none has the spinous dorsal bordered with black as figured, but all 

 have it light, and in many cases the black blotch near the middle is 

 reduced to a small spot much like that seen in C. ahei. Some speci- 

 mens also have a fight stripe near edge of soft dorsal. 



The writer retains the genus Ctenogohius as used by Jordan and 

 Snyder in The Gobioid Fishes of Japan. The tongue furnishes no 

 reliable character for dividing the group, as in some cases (C. virgatv^ 

 lus, C. ffiaumi, and others) it may be concave, truncate, or even con- 

 vex in different individuals of the same species. The condition of the 

 opercle is apparently of no aid, for when a few scales are present they 

 represent merely a more or less pronounced downward projection of 

 the scaled area of the nape, which is itself often more or less naked (C. 

 similis, C. gymnauchen) . 



CTENOGOBIUS BERNADOUI (Jordan and Starks). 



This species was based on a specimen of doubtful origin,^ "probably 

 Korea," and it is therefore of great interest that a second example, 

 in all appearances fike the type, was found in the market at Naha. 



Corypliopterus can not include this species, C. glaucofrxnum, the 

 type of the genus, having the head scaleless.* C. hernadoui has a small 

 patch of minute scales on upper part of opercle. 



CTENOGOBIUS CANINUS (Cuvier and Valenciennes). 



One specimen from the Naha market. There are a few large scales 

 on the upper edge of the opercle, not more than 2 rows; the caudal is 

 rather acutely rounded, the membrane with small, elongate black 

 spots ; ventrals jet black. 



CTENOGOBIUS CAMPBELLI Jordan and Snyder. 



This species has been known only from the type collected by Jordan 

 and Snyder at Wakanoura, Japan. Six examples were secured at 

 Naha. They do not differ from the type except in having the spots 

 more sharply defined. The tongue is slightly notched in some speci- 

 mens, truncate in others. 



> Jordan and Seale, Bull. U. S. Biir. Fisheries, vol. 25, p. 395. 

 » Jordan and Starks, Proc. U. S. Nat. Mus., vol. 28, 1905, p. 206. 

 » Idem, p. 207. 



* GiU, Proc. Acad. Nat. Sci. PMa., 1863, p. 262; also Jordan and Everman, Fishes North and Middle 

 America, p. 2219. 



