482 PROCEEDINGS OF THE NATIONAL MUSFAJM. vol. xxv. 



the caudal; anal with two simple spines; ventrals reduced each to a 

 scale-like projection, which disappears in maturity. 



Japan. 



(diKTVov^ net; ffdj/ua, bod3\) 



28. DICTYOSOMA BURGERI Van der Hoeven. 



DAINANGINPO (FORMOSA SILVP]R-TAIL). KAMI80RI UWO (RAZOR- 

 FISH). 



Dictijosoma Schlegel, Fauna Japoniea, Poiss., 1846, 11. 139, y>\. lxxiii, tijj. 3, 



Shimabara, near Nagasaki. 

 Dictyosoma burgeri Van der Hoeven, Handbuch der Dierkunde, about 1850, 



p. 347. — Bleeker, Ichth. Fauna Japan, 1853, p. 9; Kaminoseki. 

 Dictyosoma temmincki Bleeker, Verb. Bat. Gen., XXV, Japan, p. 42; Nagasaki. — 



GtJNTHER, Cat. Fish., Ill, 1861, p. 279, copied.— Ishikawa, Prel. Cat., 1897, 



p. 35; Boshu, Misaki, Sagami Bay, Hakodate, Kishin. 



Head Gi in length; depth Ti; eye 6^ in head; interorbital space 13; 

 snout 4^; D. LII, 10; A. 1,42. 



Snout short, blunt, the upper part with a fleshy ridge, which con- 

 tinues ))ackward to the occiput, growing lower posterior to eyes; 

 lower jaw somewhat longer than the upper; mouth oblique, maxillary 

 extending slightly beyond a vertical through posterior edge of orbit; 

 lips very large, thin; teeth in narrow bands on jaws, vomer, and 

 palatines, the outer row on the jaws enlarged; gill-rakers on lirst arch 

 2 + 10, small, slender, rather widely spaced; pseudobranchiw large; 

 nostrils with small tubes; no filaments on head. 



Head naked; body covered with minute, rather deeply embedded 

 scales; lateral line forming a complicated network on body. 



Dorsal inserted a little posterior to base of pectoral, spines growing- 

 longer posteriorly, the longest 3i in head; longest rays 2^; membrane 

 of tin thick and fleshy, concealing the spines, not incised; anal spine 

 weak, rays becoming longer posteriorly, those near middle of fin 

 measuring 3i in head; membrane of fin thickened about the raj^s, 

 incised between them, leaving the tips free; dorsal and anal united 

 with the caudal, there being a small incision at their union; pectoral 

 rounded, 2i in head; ventrals sometimes represented, usually in small 

 specimens, sometimes in large ones, by a pair of minute spines. 



Color, blackish or bliush olive, the head lighter, finely speckled 

 with blackish; a broad light band passing downward and ])ackward 

 from eye. Some individuals have the body sparsely spotted with 

 black. ' 



This species is very abundant in the rocky bays of middle Japan, 

 Our many specimens are from Aomori, Tokyo, Misaki, and Waka- 

 noura. It reaches a length of about 15 inches, and often comes into 

 the markets. 



(Named for Mr. Burger, who collected specimens and drawings at 

 Nagasaki for Siebold and Schlegel.) 



