NATURAL SCIENCES OF PHILADELPHIA. 145 



MoNOCENTKINiE Gill. 



2. Monocentris Japonic us. 



Monocentris Japonicus Brevoort, Notes on Figures of Jap. Fish, p. 10 ; ib. in 

 Narrative Expedition to Japan, vol. 2, p. 262, pi. vi. fig. 6. 



A single specimen of this fish is in the collection of Dr. Morrow. The figure 

 accompanying the above cited memoir of Mr. Brevoort is a very accurate repre- 

 sentation of its form. In spirits, the plates are of a brown brass color, and the 

 interspaces are blackish. The specimen is of the size figured in the plate. Is 

 there more than one species of the genus ? or does the young differ in form from 

 the adult? 



Scombroids Cuv. 

 Trichiurinje Bon. 



3. Trichiurus Japonicus. 



Trichiurus Japonicus Blkr. Verhand. von Batav. Genootschop, vol. 26, Nieuwe 

 Nalez, Ich. Jap., p. 98. 1857. 



This species has been fully described by Dr. Bleeker in his recent Memoir on 

 the Fishes of Japan and their geographical distribution. One specimen was 

 obtained by Dr. Morrow. 



ECHENEIDOID.B Bon. 

 ECHENEIDINS Bon. 



4. Echeneis naucrates. 



A single specimen of the species identified by Temminck and Schlegel with 

 the Linnaean Echeneis naucrates was obtained by Dr. Morrow. It has twenty- 

 four plates in its disc, and the sides of the caudal fin are posteriorly bordered 

 with white. 



Gobioids Cuv. 



Gobins Bon., Gill. 



5. Acanthogobius flavimanus. 



Gobius flavimanus Tem. and Schl. Fauna Japonica, Pisces, p. 141, pi. lxxiv. 



fig- 1. 



An individual of this species, five inches in length, was obtained by Dr. 

 Morrow. 



6. Rhinogobius s i m i 1 i s Gill. This fish has a great superficial resem- 

 blance to Acanthogobius flavimanus, but differs generically in the naked 

 sides of the head and in the normal number of dorsal spines. 



The head is as elongated as that of A. f 1 a v i m a n u s , but is more gibbous 

 between the eyes and jaws ; it forms nearly a quarter of the entire length, in- 

 clusive of the caudal. The eyes are moderately large, and are placed midway 

 between the snout and operculum. There are about twenty-eight scales in a 

 lateral row on the side. 

 1 1 



D vi, 1, 7 - A 1, 7 - C 9, 7, 7, 9, P 18, V, 1, 5 + 5, 1. 

 1 1 



The color is tawny, punctured with black above, and darker on the profile 

 and operculum, and there is on each side a row of five large dark spots. The 

 second dorsal is irregularly clouded ; the other fins are immaculate. 



This species would answer quite well to the description of Gobins P f 1 a u m i i 

 of Bleeker, were it not for the elongated form of the head. It agrees with that 

 species in the clear fins and in the number of scales on the sides. 



The genera to which the two Gobinie of this catalogue are referred, are fully 

 described in a Memoir on the Gobinae of the North Pacific Expedition, commu- 

 nicated to the Lyceum of Natural History of New York. 



1859.] 



