146 PROCEEDINGS OF THE ACADEMY OF 



Luciogobius Gill. 



Eody naked, elongated and slender, with the height nearly uniform 

 to he caudal fin, anteriorly cylindrical ; head depressed, above elongated 

 oval swollen on the sides, and with a central linear depression ; eyes 

 widel separated, entirely in the anterior half of the head, small and covered 

 by tb skin ; mouth nearly horizontal, moderately large and extending under 

 the e; es ; teeth pluriserial on the jaw, largest in the external row, not passing 

 to th corner of the mouth ; vomer and palatine toothless; tongue large, free 

 and i eeply emarginated anteriorly : branchial apertures small, nearly vertical 

 and nterior to the bases of the pectorals ; branchiostegals four on each side ; 

 doisal fin nearer the caudal than the head, single and oblong, preceded by 

 one or two simple inarticulated rays ; anal opposite the dorsal ; caudal rounded ; 

 pectorals rounded, with the rays entirely connected by the membrane and with 

 veitical bases ; ventrals small, united in a simple infundibuliform basin, and 

 each composed of a spine and five-branched rays ; interspinal membrane low ; 

 lateral line obsolete. 



This is the type of a very distinct tribe of the Gobioids, well characterized 

 by the esociform position of the dorsal and anal fins, and by the very small 

 number of simple rays. In the latter respect, they are represented in the other 

 families of Acanthopterygians by p h i c e p h a 1 u s , Bl., Aphredoderus, 

 Les., Ichthyoscopus, Sw., Aspidophoroides, Lac, Pseud o- 

 cliromis, Rup., &c. 



In the form of the head it has a slight resemblance to Trimnophorun, Gill. 



7. L. guttatus Gill. The body is much elongated and imperceptibly 

 declines to the caudal fin. The height at the pectorals is between a twelfth 

 and thirteenth of the extreme length, and near the caudal, it is rather more 

 than a seventeenth of the same length. 



The head is oblong oval above ; it forms about two-ninths of the total length ; 

 its breadth equals five-ninths of* the length, and is twice as great as the height. 



The dorsal is situated slightly anteriorly to the sixth-tenth of the extreme 

 length ; it is oblong and sustained by two inarticulate and twelve branched 

 rays. The anal is under the dorsal, and has thirteen rays, the first of which 

 is small and inarticulate. 



The body is brown, thickly punctured with black; the caudal, dorsal and 

 pectoral fins are also dotted with black. 



A single specimen of the length of two inches and a half is in the collection 



Bi.ennoid;e Raf. 



Centronotinje Gill. 



8. Centronotus s a b f r e n a t u s Gill. This species differs from the pre- 

 viously known Japanese species of the genus C. c r a s s i s p i n n i s , (Gun- 

 nellus crns.nspinnis Temtn. and Schlegel, Fauna Japonica, Pisces, p. 139,) C. 

 nebulosus (Gunnellus nebulosus, T. S. I.e.,) and C. dolichogaster 

 (Gunncllus dolichogaster, Brevoort,) by the presence of an almost vertical band, 

 margined on each side by purplish-whi e, which passes from the lower border 

 of the eye to the margin of the preopercle behind the lower jaw. A widely 

 curved band of purplish-white with a row of black dots passes from eye to 

 eye ; the convexity of the curve is posterior. The body is reddish-brown with 

 a dorsal band of black, and with a la eral row of large confluent black spots. 

 The fins are immaculate, but the posterior margin of the caudal is white. The 

 dorsal has from seventy-six to seventy nine spines. 



Several specimens of this species were obtained by Dr. Morrow, but only one 

 of them is in a good state of preservation. 



As the name of C e n t r o n o t u s was given to the Cuvieran Gunnelli 

 before its application to a Scombroid genus by Lacepede, and subsequently by 

 Mitchell, there is no reason why it should not be retained for the present genus. 



[April, 



