12 BULLETIN 10 0, UNITED STATES NATIONAL MUSEUM 



Uniformly drab to bister above, pale or grayish below. Fins 

 uniform like body. 



South Africa, Natal, Reunion. Also in the Eastern Pacific at 

 Washington and Chile and in the Atlantic. 



A.N.S.P. No. 34639. No data [likely Italy?]. No. 43. Length, 747 mm. Dried 

 skin. 



Family CHLAMYDOSELACHIDAE 



Body elongated and slender. Head wide and depressed. Snout 

 wide. Eyes lateral, without nictitating membranes. Mouth nearly 

 terminal, without grooves to nostrils. Teeth alike in two jaws, rows 

 oblique, bases extend back, with 3 long slender cusps. Nostrils sepa- 

 rate from mouth. Gill openings 6, anterior covers crossing throat. 

 Spiracle present, small. Intestine with spiral valve. Lateral line 

 an open groove. Dorsal posterior, spineless. Anal large. Caudal 

 long, axis low, without pits. Pectorals small. 



Genus CHLAMYDOSELACHUS Garman 



Ohlamydoselachus Gaeman, Bull. Essex Inst., vol. 16, p. 47, 1884. (Type, 



ChlamydoselacJms anguinetis Garman, monotypic.) 

 Chlamydoselachc GiJNTHER, Rep. Voy. Challenger, vol. 22, p. 2, 1887. (Type, 



Chlatnydosclaclius anguineus Garman.) 



Body uniformly slender. Tail greatly compressed and tapering 

 to point. Head small. Snout depressed. Eyes small, elongate, ad- 

 vanced. Pupil horizontal. Mouth very wide, extends far back of eye, 

 without labial folds. Teeth raptorial, alike in two jaws, each with 

 broad base and three slender, curved, subconic cusps, with or without 

 rudimentary cusps; no median teeth in upper series; median lower 

 symphyseal series. Nostrils large, lateral on snout, little inferior. 

 Opercle forms broad frill over first gill. Edge of first gill opening 

 free across isthmus. Fins wide. Caudal not notched. 



Fossils are known from teeth in the Pliocene of Tuscany. 



CHLAMYDOSELACHUS ANGUINEUS Garman 



Chlamydoselachus anguineus Gaemais-, Bull. Essex Inst., vol. 16, 1884, p. 47, 

 figs, (type locality: Japanese Seas) ; Science, vol. 3, p. 116, text fig., 1884 

 (Japan) ; Bull. Mus. Comp. Zool., vol. 12, no. 1, p. 1, pis. 1-12, 1885 (anat- 

 omy) ; vol. 17, p. 82, pi. 15, 1888 (lateral canal system). — Goode and Bean, 

 Oceanic ichthyology, p. 22, pi. fig. 6, 22, 1895 (copied). — Ishikawa, Annot. 

 Zool. Japon., vol. 2, p. 95, pi. 4, 1898 (young). — Garman, Mem. Mus. Comp. 

 Zool., vol. 24, p. 41, pi. 7, 1899 (lateral canal system) (type ; Tokyo). — Jokdan 

 and Snyder, Annot. Zool. Japon., vol. 3, p. 37 (off Yokohama), p. 128 (ref- 

 erence), 1901. — Jordan and Fowleb, Proc. U. S. Nat. Mus., vol. 26, p. 596, 

 1903 (Kuro Shiwo, off Izu, Sagami, Awa).— Stead, Zool. Anz., vol. 32 p. 303, 

 1907 (Port Jackson, Australia). — Garman, Mem. Mus. Comp. Zool., vol. 36, 

 p. 14, pi. 59, figs. 4-5 (egg), fig. 6 (branchial skeleton), pi. 61, figs. 7-8 

 (embryo), 1913 (Sagami Sea). — Izuka and Matsuitba, Tokyo Museum 



