the Inland Sea of Japan. 19 



nniiow. Interorbital region, snout, jaws, suborbitals, and 

 praeoperculum naked ; rest of the head scaly. Cheek with 

 C series of scales ; pireoperculuni rounded and slightly pro- 

 duced at the angle, with radiatingridges and crenulate margin ; 

 oporcnluni with two spines. Pseudobranchiai well developed ; 

 gill- rakers as long as gill-fringes, 20 on the lower part of 

 anterior arch; six branchiosteg;ds. Dorsal X 10, the spines 

 increasing in length to the fourth, which is nearly |- the 

 length of head, the last a little more than ^ the length of 

 head. Anal III 8. Dorsal and anal fins scaleless. Pectoral 

 j'alcate, with 17 rays, longer than the head, extending to 

 above the origin of anal. Ventrals commencing a little behind 

 the pectorals, extending to the vent. Caudal deeply forked, 

 covered with scales except near the posterior margin. Scales 

 finely denticulated, 72^^. Lateral line concurrent with the 

 dorsal profile. Uniformly olivaceous. 



Total length of the sj)ecinien described, 230 mm. 



This species has been referred by Jordan and Snyder to the 

 genus Aprion, Cuv. & Val. I have compared it with the 

 type species, A. virescens, which differs notably in the more 

 elongate body, larger mouth and stronger dentition, deeper 

 prgeorbital and very short pectoral. It is also evident that 

 the structure of the skull must be very different. I have also 

 compared G. Sieholdii with Aspilas dentatus, Guichenot, which 

 is the type of the genus Tropidinhis, Gill, but is placed by 

 Messrs. Jordan and Evermann in Aspilus, Cav. & Val. The 

 two species appear to me to be closely allied and certainly 

 congeneric. On the other hand, Aspilus fuscus, the typical 

 species of the genus Aspilus, seems to be a very different 

 tish, especially in lacking canine teeth. I am therefore in- 

 clined to retain the genus Chatopterus and to regard 

 Tropidinius as a synonym of it. 



Gymnapogon, gen. nov. 



Allied to Telescopias, Jord, & Snyder. Body oblong, 

 compressed ; scales entirely wanting ; sides of head with a 

 network of series of small pores; body with 20 or more 

 vertical series of small pores on each side, and with the 

 lateral line apparently represented by a longitudinal series 

 running to below the soft dorsal and usually commencing 

 again on the middle of the side and running to the base of 

 the caudal. Mouth wide, oblique; jaws equal anteriorly; 

 piaxillary exposed ; teeth pointed, in a single series in the 

 jaws and on the palatines ; vomer with a few teeth ; lower 

 iaw w ith 3 or 4 curved canines on each side, placed laterally ; 

 •^ 2* 



