264 Annals of the Carnegie Museum, 



duced into a strong spine ; the cuirass consists of four median pairs 

 of narrow bone and six lateral ones of the lamelliform shape, and of 

 a single, long, dagger-shaped bone, forming the dorsal spine ; sutures 

 of all these bones deeply serrated except the dorsal median sutures; 

 lower parts of the sides covered with a transparent tough covering, 

 supported by nine ribs. 



Close beneath the posterior spine the vertical fins are crowded ; the 

 spinous and soft dorsal point nearly straight backward, the caudal 

 obliquely downward, and the anal straight downward; the pectoral 

 inserted upon the middle of the sides above, the distance from the 

 operculum equals the length of the orbit and the operculum taken 

 together, the distance between the pectoral and the tip of the snout 

 much exceeds the distance between the former and the root of the 

 first dorsal spine, the fin rather long, the uppermost ray the longest; 

 ventrals rudimentary, inserted upon the carinated edge of abdomen, 

 below the fourth rib, its distance from the anterior orbital margin 

 nearly equals the distance between the ventral and the soft dorsal 

 base; dorsal spines rather slender, inserted close together beneath the 

 base of the dorsal spine, connected with it and with one another by a 

 transparent membrane, the first spine the longest, nearly twice as long 

 as the third; soft dorsal rather slender, elongate, reaching beyond the 

 tip of caudal ; caudal fin quadrate, its tip obtusely rounded. 



Color in alcohol pale yellow; rostral tube, the place occupied by the 

 air-bladder, and the membraneous margin of the lower parts trans- 

 parent; all the fins whitish. 



Total length io8 mm. 



Type: Described from a specimen from Toko, collected by A. 

 Kihara, and now in the Carnegie Museum, Cat. of Fishes, No. 8287, 

 marked "type specimen." 



Habitat: Toko, a small town at the estuary of the Shimo-Tamusui 

 River (three specimens). 



The present species distinctly differs from Centriscus scutatus in 

 the following points : 



1. Head is longer, contained less than three in the total length. 



2. Pectoral inserted much behind a point midway between the tip of 

 snout and the root of the first dorsal spine. 



3. Ventral is provided with four rays. 



4. The distance between the ventral and the pre-orbital edge much 

 longer than that between the former and the root of the last anal ray. 



