20 



DEEP-SEA FISHES OF THE ATLANTIC HASIN. 

 MEASUREMENTS — Continued. 



Second dorsal — Continued. 



Greatest height 



Length of posterior margin 



Anal: 



Distance from snout 



Length of base 



Greatest height 



Length of anterior margin 



Length of posterior margin 



Caudal : 



Distance from end of second dorsal 



Distance of tip from end of si-coml dorsal 



Greatest w idt h 



Length uf upper lube 



Greatest width of upper lobe 



Hun- 

 dredths 



of 

 length. 



Caudal— Continued. 



Distance of lower lube from anal liaso. . . 



Length of anterior margin of lower lobe 



Length of longest margin of lower lobe. 

 Pectoral : 



Distance from suoiit 



Greatest length 



Width of base 



Greatest width 



Ventral : 



Distance from snout 



Greatest length 



Lcngtli of posterior m;ir;:in (last ray) . . . 



Width of base 



Greatest width 



170 

 222 



5.7 

 7.5 



PRISTIURUS, Bonaparte, 



I'risliurus, Bonaparte, Fauna Italica, Pesce, 1832, 42. — Gunthek, Cat. Fish. Brit. Mas., viii, 1875, 406. — 

 Canestrini, Pesc. Italici, 50. 



Scyllioid sharks with two spineless dorsal fias, the first above or beliitid ventrals, the 

 second above liitider (Mid of anal; one or two were of small, flat spines arranged saw-like 

 on each side of the upper edge of the candal. Snont elongated, covered with a thick layer 

 of cellular tissue, within which a gelatinous substance is secreted, escaping by numerous 

 pores of the skin. Si)iracles present. Nostrils wide, inferior, covered by a valve. Teeth 

 small, ti'icusi)id. Kepresented l)y a single species. 



PRISTIURUS MELASTOMUS,(Rafinesque), Bonapakte. (Figure 10.) 



Galciis melnstomiis, Rafinesque, Caratt. Anim. Piant. Sicil., 1810, 13. 



Scylliorhinus melaslom-ts, Blainviixe, Faun. Franc, 74. 



ScyUiiim mcfantomiim, Je.vvn.s, Manual, 497. 



J')-istiuru8 mclanoslomus, Bonaparte, Fauna Italica, Pesce, pi. XLix, fig. 3. — DUMitRiL, Elasmobr., 325. — 6t)N- 



TiiEU, Cat. Fish. Brit. Mus., viii, 406, Challenger Report, 2. — Collett, Norges Fiske, 407; Nyt. Mag. f. 



Naturvid., xvin, 1884, 117.— Can'ESTRINI, Pesci Italici, 51.— Giglioli, Eleneo, 112. • 

 Sqitalus anniilatiis, NiLSSON, Proiliomus Ichthyologica Scandinavicie, 113. 

 ySciiUium annulatum, NiL.ssoN, Skand. Fauna, 713. 

 Sciillium ArtedijRisso, Hist. Nat. Europe Meridionale, m, 1827, 117. 

 Pristiurns Artedi, BocAGK and Cafello, Peixes Plagiostoiuos, 1866, 11. — (ai'Ello, Jorn. Acad. Sci. Liiaboa, ii, 



139; Cat;ilogo dos Peises de Portugal, 1880, 44. 

 Sci/Uiiim iicanthoniitiim, Defii.. anil Vkk. (young 8i)ecimeu, _/iVe Giglioli). 



A PrisUuriix witli the nasal valves separated by a broad interval and placed nearer to 

 the mouth than to the end of the snout; a short labial fold round the angle of the mouth. 

 Dorsal flns subetjual in size, the second above the hinder part of the anal; anal fin nearly 

 as long as the head to the first gill opening; upper parts with loiinded darker spots of vari- 

 ous sizes, each with a lighter margin. {Gunther). 



Pristiurus claims a place among deep-sea fishes on account of its captures near Tromsiie, 

 at a depth of 2'M fathoms. The spc-cies is abundant on the coast of Norwa.y, as far north as 

 Trondhjems Fiord (lat. 63° 30'), where, according to Storm, it is found in considerable depths 

 (lat. 70°). It is rare on Christiania Fiord (lat. 58°). Farther south it is a littoral form, 

 occurring at Madeira and also in the vicinity of Lisbon, where it is rare and is called 

 Lcitiio or Litdo. It is the "Eyed Dogfish" of Couch and Yarrell, who have recorded a 

 single specimen (25 inches long) from the coast of Cornwall, taken by a line fisherman 

 off Polperro, in 1S37. 



