66 THE VOYAGE OF H.M.S. CHALLENGER. 



concave, with a pair of slight ridges within its concavity. Vertex with a quadrate 

 depression, which is rather broader than long, and surrounded by spines. The maxillary 

 does not extend backwards to below the middle of the eye. All the cutaneous appendages 

 on the head, body, and fins are well developed. The fourth and fifth dorsal spines are the 

 longest, two-fifths of the length of the head, and equal to the second of the anal fin, 

 which, however, is stronger. Eight of the pectoral rays are branched. Body and fins 

 marbled with the usual colours of this genus, but without any peculiar markings. The 

 axil of the pectoral is scarcely spotted, and the lower part of the head is white. Japan. 

 Length of specimen, 5-^ inches. Market of Yokohama. 



Pterois lunidata, Schleg. (probably =P^e)'a{s volitans, L.), Market of Yokohama. 



Tetraroge longispinis, C. V., var. nuda. 



In the typical form of this species the body is covered with minute but very conspicuous 

 scales. In the following specimens the scales are so rudimentary, and in such small num- 

 ber, that the body appears to be almost naked. No other distinction can be made out be- 

 tween the scaly and naked specimens. Length of specimens, 1^ to S^ inches, Kobe, Japan. 



Scicena^ since, C.V.,' Inland Sea, Japan. 



Trichiiirus lepturus, L. { = Trichiurus savcda, Cuv. = Trichmrtis armatus, Gray = 



Trichiurws japonicws, Blkr.), ofi" Inosima, 345 fathoms. 

 Prionurus scalprum, Langsd., Market of Yokohama. 

 Trachurus trachurus, L., Market of Yokohama. 

 Caranx muroadsi, Schleg., Inland Sea, Japan. 

 Equula nuchalis, Schleg., Market of Yokohama. 

 Zeus japonicus, C. V., Market of Yokohama. 

 Cyhium niphonium, C. V., Inland Sea, Japan. 



Brama rail, Bl. (this also is a new addition to the Japanese fauna), off Inosima, 

 purchased of fishing-boats. 

 . Psenes anomalus, Schleg., Market of Yokohama. 

 Percis sexfasciata, Schleg., Market of Yokohama. 

 Uranoscopus asper, Schleg., Market of Yokohama. 

 Sillago japonica, Schleg., Inland Sea, Japan. 

 Latilus argentatus, C. V., Market of Yokohama. 

 Lop>hius setigerus, Wahl, Yokohama, Kob^. 



Platyceplialus insidiator, Forsk., Yokohama Bay, Inland Sea of Japan. 

 Platycephalus punctatus, C. V., Inland Sea, Japan. 



Platycephalus rudis, n. sp. (PL XXIX. fig. B). 



D. 1/8/11, A. 11, L. lat. ca. 70. The length of the head is one-third of the total 



