260 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxv. 



all plain. Total length 9| inches. Here described from a specimen 

 from Okinawa. 



This species is very common throughout the East Indies and the 

 equatorial islands of Polynesia as far as Hawaii. It is represented in 

 our collection l)y one large example from Nafa, in Okinawa, collected 

 b}' y. Koneyama. There is no other record from Japan. 



{(ictdeatus:^ bearing spines or needles.) 



6. CANTHIDERMIS Swainson. 

 Cuiilhideiinin ^wxis^os, Claisn. Anini., ISoU, II, p. 325 {(m(/uloim!<=)n(icakdus). 



This genus differs from Bid/strx chiefly in having the gill opening 

 surrounded by ordinary scales, there being no developed bony scutes 

 behind it. Body much more elongate than m BaJlstcs ; dorsal spines 

 3; dorsal and anal elevated in front; caudal with its angles acute; scales 

 moderate, not very rough; scales of caudal peduncle unarmed, or with 

 a medium spine; cheeks completely scaled; a naked groove before aya. 

 Species inhabiting l)oth Indies. 



[aKixvOa^ spine; Sepjua, skin, the word, as usual, misspelled by 

 Swainson.) 



8. CANTHIDERMIS ROTUNDATUS (Proce). 



Batistes rotundatm Troce, Bull. Soc. Pliilom., 1822, p. 130; Manila ("D. III. 26, 

 A. 21. Scales equal; tiiil unarmed, brown with black spots.") 



Ballstr.^ a:inriis Lessox, Voy. Coquille, II, 1824, p. 121, pi. x, fig. 2. 



? Bdl isles (iiKjiiJoms QuoY and Gaimard, Voy. Uranie, Zool., 1824, p. 210. 



Bulistes ucidfttus Gray, Hardwicke's Illustr. Ind. Zool. Fish., 1832, pi. viii, fig. 1; 

 India.— Bleeker, Atlas Ichth. Balist, 1865-69, p. 121, pi. iv, fig. 2. 



?? Balisies adspcrsus TscHuni, Fauna Peruana, 1846, p. 31; Peru. 



Balistes scnticosns Richardson, Voy. Saraarang, Fish., 1850, p. 23, pi. ix, figs. 5-8; 

 China Sea. 



Balistes maculatm Gunther, Cat. Fish., 1870, VIII, p. 214; Cape of Good Hope, 

 Pinang, Borneo, Sandalwood Island, China, Japan (in part, not of Bloch, 

 whose type came from the West Indies). — Day, Fish, India, p. 687, 1878, pi. 

 CLXxxvi, fig. 3; Madras. 



B. IV. D. HI., 26 or 27; P. 15; A. 24 or 25; C. 12; scales 46 to 55; 

 L. tr. 28; length of head 3| to -l; of caudal fin 6^ to 7, height of body 

 2i to 3 in total length; eye 2 to 2^ diameters from end of snout and 2 

 apart. A groove in front of eye. Teeth uneven, notched. First 

 dorsal fin commences above gill opening, its anterior spine strong and 

 nearlj' i as long as head; ventral spine usually movable; posterior edge 

 of caudal convex or undulated ; second dorsal and anal high anteriorly, 

 especially in adults. Cheeks entirely scaled; no osseous scutes behind 

 gill opening. Scales rough and granulated, but without spines or 

 prominent tubercles, except in the immature. Bluish black young 

 examples are covered with numerous light blotches, more especially 

 on lower half of bod}", these spots are less numerous and larger in 

 adults; dorsal spines black; eyes hazel. Indian and Pacific oceans. 

 It is verj" common at Madras, attaining at least 16 inches in length. 



