516 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



Depth 6% to subcaudal origin; head 4i/4, width 1%. Snout 3% 

 in head, short, sharp; eye ? ; preoral length 1%; interorbital 214.0, 

 longitudinally concave. 



Plates of back 11, large, rugose or warty, without distinct spines; 

 lateral plates 32, each with spine jn front ; ventral plates 11, smooth. 

 No bony plates on body except few small ones between large anterior 

 ones of dorsal series; body skin soft and smooth between plates; 

 opercle rugose; cheeks with fine stellate prickles. 



Dorsal origin entirely behind ventrals, front edge 1% in head, 

 with more than 60 rays ; anal origin opposite last % of dorsal base, 

 front edge 1% in head, with 40 rays; caudal 41/3 in rest of body, 

 front edge of subcaudal li/^ in head ; pectoral 1% ; ventral 2%. 



Color? Length, 1,800 mm, (Jordan and Snyder.) 



Japan. The type was captured in the open sea at Misaki and 

 prepared as a dry mounted specimen for the Museum of the Im- 

 perial University at Tokyo. 



ACIPENSER DABRYANUS Dumfiril 



Acipenser (Antaceus) daJ)ryamiH Dum^ril, Nouv. Arch. Mus. Hist. Nat. Paris, vol. 



4, p. 98, pi. 22, fig. 1, a-b, 1868 (type locality: Yautze-Kiang). 



Acipenser {Acipenser) da'bryanus DvMf.voL, Hist. Nat. Poiss., Ganoides, vol. 2, 



p. 193, 1870 (type). 

 Acipenser dahryanus Mori, Journ. Pan Pacific Res. Inst., vol. 3, p. 3, 1928 ( Jinsen 



and Buganho, Korea). 



Depth 8 to subcaudal origin; head 3%, width 214. Snout l%o ii^ 

 head, elongate, narrowly triangular; eye 141/2, 7% in snout; barbels 

 near last % in snout length; interorbital 3% in head. 



Dorsal plates 12, each ending in rather large spine, rugose; 33 

 lateral plates, rather small and well spaced ; ventrals 10, rugose, each 

 with strong spine. 



Dorsal falls close behind depressed ventral ends, front edge 2% 

 in head, rays 42; anal origin about opposite last % of dorsal base, 

 front edge 31/5 in head, rays 30; caudal equals head, front edge of 

 subcaudal l%o; pectoral 2; ventral 3yio. 



Back brown to lateral keels, rest of body yellowish white with 

 silvery sheen on belly. Length, 350 mm. (Dumeril.) 



Yang-tze-kiang, China, Korea. 



ACIPENSER CHINENSIS Gray 



Acipenser chinensis Gray, lUustr. Indian Zool. Hardwicke, vol. 2, pi. 98, fig. 



5, 1832-34 (type locality: China). — Richardson, Ichth. China Japan, p, 

 198, 1846 (China).— Gray, List fish British Museum, vol. 1, p. 6, 1851 

 (China). 



Acipenser (Acipenser) chinensis Dumeril, Hist. Nat. Poiss., Ganoides, vol. 

 2, p. 191, 1870 (China, probably Hong Kong). 



Acipenser sinensis Gray, Proc. Zool. Soc. Loudon, 1834, p. 122 (China). — 

 FiTziNQER and Heckel, Ann. Wiener Mus., Zool. Abhandl., vol. 1, p. 275, 

 1836 (copied).— GtiNTHEB, Cat. Fish. Brit. Mus., vol. 8, p. 338, 1870 (types).— 



