124 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



Proc. U, S. Nat. Mus., vol. 28, p. 815, figs. 1-2, 1905 (between Umezawa and 

 Mayegawa, near Kosu, Sagami Bay, 150 to 200 fathoms). — Zietz, Trans. 

 Roy. Soc. South Australia, vol. 32, p. 291, 1908 (near Murray River mouth). 

 — Snydee, Proc. U. S. Nat. Mus., vol. 42, p. 40, 1912 (Mororan). — ^Waite, 

 Rec. South Australian Mus., vol. 2, No. 1, p. 20, fig. 26, 1921 (Goolwa within 

 Murray River mouth). — Jobdan and Hubbs, Mem. Carnegie Mus., vol. 10, 

 p. 102, 1925 (Sagami Sea). — Whitley, Mem. Queensland Mus., vol. 10, 

 pt. 4, p. 199, 1934 (reference). 



f^capanorhynchus owstoni Regan, Proc. Zool. Soc. London, 1906, p. 744 (stuffed 

 example). — Hussakoff, Bull. Araer. Mus. Nat. Hist., vol. 26, p. 258, text fig. 

 lA, fig. 2a-a\ 1909 (dorsal views of head) (Japan). — Garman, Mem. Mus. 

 Comp. Zool., vol. 36, p. 28, pis. 41, 51, 5G, 1913 (Sagami Sea).— Fowler, 

 Proc. 4th (1929) Pacific Sci. Congr., Java., p. 488, 1930 (reference). 



Scapanorhynchufs jordani Hussakoff, Bull. Amer. Mus. Nat. Hist., vol. 26, p. 

 257, text fig. IB, fig. 2b-b\ c-c\ pi. 44, 1909 (type locality: Japan). 



8capanorhynchus dofleini Engelhabdt, Zool. Anz., vol. 39, p. 644, 1912 (type 

 locality: Japan). 



Deptli 7^2 to subcaudal origin; head Sy^, width nearly 3. Snout 

 about 2 in head; eye 18%, 11% in snout, 5% in interorbital ; mouth 

 length from upper jaw tip 4 in head, width about % its length; lower 

 labial fold less than 14 j^w length; teeth in 48 to 50 rows in jaws, 

 slender, curved, bases double, crowded forward in jaws; nostrils small, 

 inconspicuous, rather close before eye ; interorbital about % of head, 

 rather low. Gill openings subequal. Spiracle large as eye, posterior 

 little over 2 eye diameters. 



First dorsal inserted nearly midway between rostral tip and sub- 

 caudal origin ; fin length about 3 in head ; second dorsal length about 

 334; anal length about 2; pectoral 2%, width about 1% its length, 

 which 2 to ventral origin ; ventral length 1% in head ; caudal 2% in 

 rest of body, front subcaudal edge 314 its length. 



Gray brown, paler below. 



Japan, South Australia. 



U.S.N.M. No. 50972. Between Umezawa and Mayegawa, near Kozu, Sagami 

 Bay, Japan, in 150 to 200 fathoms. Alan Owston. February 26, 1903. Length, 

 3,355 mm. 



Family ALOPIIDAE 



Body moderately long, partly fusiform. Tail little more than half 

 total length, without lateral keels. Head short, rounded. Eye large, 

 without nictitating fold. Mouth crescentic, with labial folds. Teeth 

 alike in two jaws, small, simple, flat, triangular. Nostrils transverse. 

 Gill openings moderate. Spiracles present. First dorsal above space 

 between pectorals and ventrals. Caudal with vertebral axis raised, 

 pits at root. Pectoral very large. Ventrals rather large. 



One genus. Fossils from the upper Tertiary. Among all fishes 

 this shark is readily known by its very long, slender, arched tail, 

 greater than the rest of the body. 



