DISCUSSION OF SPECIES AND THEIR DISTRIBUTION. 11 



The Frencb expedition obtained an individual, 230 niillinicteis long, at Station CXI, in 

 the eliaiinel of St. Viut-ent, St. Antoine, in the Cape Verde Islands, at a depth of 580 meters. 



CENTROSCYLLIUM, Muller and Henle. 



CintroscijUium, Mi'LLER and Hkxlk, S. B. Flag., 1841,191 [t^-pe Sp'tnuj- Fubricii 'Rvinhaidt^. — .Jordan' and 

 (Jll.BKUT, Joe. lit. 



Spinacoid.s with teeth equal in both jaws, small, straight, pointed, each with one or two 

 smaller cusps on each side at base; mouth crescent-.shaped, with a straight, oblique groove 

 at angle; spiracles medium; branchial openings rather narrow; two dorsal fins, each with 

 a strong spine; the second entirely behind the ventrals. 



CENTROSCYLLIUM FABRICII, (Rkixuardt), Mui-i.er aud Hf.ni.k. (Figure 7.) 



Spinax fabrieii, Reinhardt, Dausk. Vid. Selsk. Forh., Iii, 1828, xvi. 



CenlroscyUium fabrieii, Mt'LLEU and Henle, op. cit., 191. — Dum^ril, Elasniobr., 449. — Gunther, Cat. Fisb. 



Brit. Mus., VIII, 425. — Goode and Bean, Bull. Essex Inst., xi, 1879, 30. — Vaillant, Travailleur and 



Talisman, 73. — Jordan and Gilbert, Bnll. xvi, U. S. Nat. Mus., 1883, 6. 



Body somewhat rounded, covered with miaute stellate scales; dorsal tins short, each 

 preceded by a strong .spine; teeth in both jaws tricuspid, small; color, dark Ijiown. 



This little shark, x>i'eviously known only from the coast of Greenland, has, since 187S, 

 been found to be common on the offshore banks at depths of 150 or more fathoms in com- 

 pany with Centnm'i/iiniiis. \'aillant's assignment of a S2)ecimen from the Banc d'Aiguin, 

 750 fathoms, to this species, is at best very questionable. 



A young individual, probably G. Fabrieii, was taken at station 2377, February 11, 

 1885. Colors: '-All the tins whitish, except caudal, which is yellowish; dorsals with a nar- 

 row black stripe anteriorly; tip and lower lolie of caudal with very broad black margin; 

 iris greenish golden ; sides with several lines made up of dark dashes.'' 



CENTROSCYLLIUM GRANULATUM, Gunther. 



Cenlrosci/lliiim (/riiniilaliim, Gi'nthek, C halleuger Report, xxii, 7. 



This form is evidently, as Dr. Giinther indicates, very closely allied to Venfroscyliivm 

 Fabric!!, having the same disposition of the fins, size of teeth, and dorsal spines, but the 

 epidermoid productions of the head and body are much coarser and in the form of granula- 

 tions, whilst in Geiitroscyllium Fabrieii they are minute. 



One .specimen, 11 inches long, badly mutilated, was obtained by the ChalleiKjer at 

 Port Stanley, Falkland Islands, station 311 ; depth 245 fathoms. 



SCYMNODON, Bocage and Capello. 

 Sciimnodoii, Bocaoe and Capello, I'roo. Znol. Soe., 1864, 2(53 [ty]ie .S. riiiiic>i.s, B. & C.]. 



Spinacoids, with teeth in upper jaw simply pointed, and teeth in lower jaw more or less 

 erect, triangular. Scales leaf shajjcd, with three strong ribs, each terminating in a point 

 below. Dorsal tins small, low, each preceded by a small spine. 



A single species, <S'. ringens, from deep waters off the coast of Portugal, has been 

 described. [Bocage aud Capello, loc. cit. — Giinther, Cat. Fish. Brit. Mus., viii, 423. | 



SCYMNODON RINGENS, Bocage and Capello. (Figure 12.) 



Scymnodon ringens, Bocage and Capello, P. Z.S., 1864, 263, fig. 5; Peix. Plagiost., i, jil. i, lig. 1. 

 Cimlrophorus ringens, GCnther, Cat., viii, 423. — Capello, .lorn. Acad. Sc. Lisboa, ii. 14."), fig. of the teeth; 

 Cat. Peix. Port., 1880, 49. Coasts of Portugal. Rare. (Lisbon and Setubal.) 



A Scymnodon with labial groove extending for some distance along the margins of jaws. 

 Upj)er teeth small, narrow, lanceolate; lower teeth more or less erect, triangular; the lateral 

 ones somewhat inclined backward. Distance betweeu nostrils one-half length of snout. 

 Lower angle of pectoral rounded, not produced. Dorsal spines feeble, projecting but 



