DISCUSSION OF SPECIES AND THEIR DISTRIBUTION. 11 



Tbe Freucb expedition obtiiiued an individual, 230 millimeters long, at Station cxi, in 

 the channel of St. Vincent, St. Antoine, in the Cape Verde Islands, at a depth of 580 meters. 



CENTROSCYLLIUM, MuUer and Henle. 



Ccntroscyiliuin, MiXLER and Hkxlk, S. B. Plag., 1841, 1!U [t.\qie Sphuix Fahricii RviuhaTilt]. — .Ii>1{I>ax and 

 UiLBi-.l'.T, loc. (it. 



Spinacoids with teeth ecjiial in both Jaws, small, straight, pointed, each witli 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 tins, eacli witli 

 a strong spine; the second entirely behind the vcntrals. 



CENTROSCYLLIUM FABRICII, (REixiiARivr), Mri.i.Ei: aud Hf.xi.i:. (FiKure 7.) 



Spinax fahiicii, Reinhaisut, Dausk. Vid. Selsk. Fiiih., iii, 18-'s. xvi. 



CmtrosdjUimn fabrkii, JU'llfk aud Henle, op. cit., I'Jl.— Dcmeuil, Elasiiiol)r., 44!).— Gunther, Cat. Fish. 



Brit. Mils., VIII, 425.— (JOODE aud Bean, Bull. E.ssex Inst., xi, 1879, W).— Vaii.laxt, TTaraillpiir and 



Talisman, 73. — .Iordan and Gii.iiERT, Bull, xvi, U. S. Nat. Mus., 1883, t;. 



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

 preceded by a strong sxjine; teeth in both jaws tricuspid, small; color, dark brown. 



This little shark, previously known only fioin the coast of Greenland, has, since 1S7S, 

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

 pany witli CcntroKcijiHnus. ^'aiIlant's assignment of a specimen from tbe ISaiic dWrguin, 

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



A young individual, probably C. F<(bricii, was taken at station li.'JTT, I'ebruary 11, 

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

 row black stripe anteriorly; tiji and lower loiie of caudal with very broad black margin; 

 iris greenish golden; sides with several lines made uj) of dark dashes." 



CENTROSCYLLIUM GRANULATrM, Glnther. 



CeHlroscyUiiim f/i-ii»iihiltim, GiJNTllF.R, ( balleuger Report, x.xii, 7. 



This form is evidently, as Dr. Gilnther indicates, very closely allied to Centroncyllium 

 Fahricii, 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 CentroseyUiuiii Fabricii they are minute. 



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

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



SCYMNODON, Bocage and Capello. 

 Saimnodon, Bocage and Capei.i.O, IToc. ZoiU. Sue, 1864, 2G3 [t> ye ■'^■- rhiiitii.% I!. & C.]. 



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

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

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



A single species, .S'. rhujcns, from deep waters oft' the coast of Portugal, has been 

 described. [Bocage and Capello, Joe. c/<.— Giinther, Cat. Fi.sh. Brit. Mus., viii, 423.] 



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



Sciimnudoti liiujens, Bocage and Capello, P. Z. S., 1804, 203, tig. 5; Peix. Plagiost.. i. jii. i, lig. 1. 

 Centrophorm rhtyen.i, Gi-ntiier, Cat., viii, 423.— Capello, .Join. Acad. Sc. Lislxm, ii. li'<. lig. ottli.- t.cth; 

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



A Scymnixhm with labial grooveextendingfor some distance along the margins of Jaws. 

 Upper teeth small, narrow, lanceolate ; lower teeth more or less erect, triangular ; the lateral 

 ones somewhat inclined backward. Distatice between nostrils one-half length of snout. 

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



