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



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

 depression, whicli is ratlier broader tlian 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 tlie length of the head, and equal to the second of the anal fin, 

 which, however, is stronger. Eight of tlie 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 lunulata, Schleg. (probalily = P^ero/s volitans, L.), Market of Yokohama. 



Tetraroge longispinls, C. V., var. nuda. 



In the t}q3ical form of this species the body is covered witli 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 lie almost naked. No other distinction can Ije made out Ije- 

 tween the scaly and naked specimens. Length of specimens, 1^ to 3i inches, Kobt^, Japan. 



Scicenajina, C. V., Inland Sea, Japan. 



TricJiiurus lepturus, L. {= Trichiurus savala, Ci\v. = Trichiurus armatus, Gray = 



Trichiurusjaponicus, Blkr.), off Inosima, 345 fathoms. 

 Prionurus scalprum, Langsd., Market of Yokohama. 

 Trachurus tvachurus, L., Market of Yokohama. 

 Caranx wmroadsi, Schleg., Inland Sea, Japan. 

 Equida nuchalis, Schleg., Market of Yokohama. 

 Zeus japonic us, C. V., Market of Yokohama. 

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

 Brama raii, 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. 

 Ufanoscopus asper, Schleg., Market of Yokohama. 

 Sillago japonica, Schleg., Inland Sea, Japan. 

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

 Lopldus setigerus, Wahl, Yokohama, Kobe. 



Platycep)h(dus insidiator, Forsk., Yokohama Bay, Inland Sea of Japan. 

 Platycepjlialus punctatus, V. V., Inland Sea, Japan. 



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



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



