20 



DEEP-SEA FISHES OF THE ATLANTIC BASIN. 

 MEASUREMENTS — continued. 



Second dorsal — Continued. 



Greatest height 



Length of iiost^Tior margin 



Anal : 



DistaDCi' from snout 



Length of hast) 



Greatiist height . ^ - 



Lengtli of anterior margin 



Length of posterior margin 



Caudal: 



I>istan»;o frum end of srcond dorsal 



Distanic t»f tip from end of second dorsal 



Greatfst width 



Length of upper lobe 



Greatest width of upper lobe 



Caudal — Continued. 



Distance of lower lobe from anal base. . . 



Length of anterior margin of lower lobe 



Length of longest margin of lower lobe. 

 Pectoral : 



Distance from sno ut 



Greatest length 



Width of base 



Greatest width 



Ventral : 



Distance from snout 



Greatest length 



Length of posterior margin (last ray) - . . 



Width of base 



Greatest width 



PRISTIURUS, Bonaparte, 



I'riaHurm, Bonaparte, Fauna It.alica, Pesce, 1832, 42.— Gunther, Cat. Fish. Brit. Mus., viii, 187.5, 406.— 

 Cajmestrini, Peso. Italici, 50. 



Scyllioid sharks with two spineless dorsal fiu.s, the first above or behind ventruls, the 

 second above hinder end of anal; one or two were of small, flat spines arranged saw-like 

 on each side of the upper edge of the caudal. Snout elongated, covered with a thick layer 

 of cellular tissue, within which a gelatiuous substance is secreted, escajiing by numerous 

 jjores of the skin. Spiracles present. Nostrils wide, inferior, covered by a valve. Teeth 

 small, tricuspid. Represented by a single species. 



PRISTIURUS MELASTOMUS,(Rafinesqi:e), Bonai-artk. (Figure 10.) 



Gahiis miluslomiis, Rafine.sque, Caratt. Auim. Plant. Sicil., 1811), 13. 



ScyUiorhinus melaslODfis, Blainvili.e, Fauu. Franc, 74. 



Sciillhim melantomiim, .Ienyns, Manual, 497. 



l'ri.itiunis miiaiiostomuH, Bonaparte, Fauna Itallca, Pesce, pi. xlix, fig. 3. — DuMfsRli., Elasmobr., 325. — Gi'iN- 



TiiER, Cat. Fish. Brit. .\Ius., viii, 401;, Challenger Report, 2. — Collett, Norges Fiske, 407; N,yt. Mag. f. 



Naturvid., xviii, 1S84, 117.— Cane.strini, Pesci Italici, 51.— Giulioli, Elenco, 112. 

 Squalus aiiiiiiliiliin, NlussoN, Prodromus Ichthyologica Scandiuavicii', 113. 

 SviilHiim aiiiiKlatiim, N1L.SS0N, iSkaud. Fauua, 713. 

 Si-i/lliiim .(r^crft, Rr.s.so, Hist. Nat. Europe M<;ri<lionale, ill, 1827, 117. 

 I'risliiinis Irtedi, BocAGE and Capello, Pei.xes Plagiostomos, 186G, 11. — C'apello, Join. Acad. Sci. Eiobua, 11, 



139; Catalogo dos Peixes de Portugal, 1880, 44. 

 Sci/lliiim itranlhonotum, Defil. au<l Ver. (young specimen, /rffl Giglioli). 



A J'nstiurus with the nasal valves separated by a broad interval and ])laced nearer to 

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

 Dorsal fins snbeqiml in size, the second above the hinder part of the anal; anal fin nearly 

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

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



rriniiiirus claims a ])lace among deep-sea fishes on account of its captures near Tromsoe, 

 at a dei)th of 250 fathoms. The species is abundant on the coast of Norway, as far north as 

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

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

 occurring at Madeira and also in the vicinity of Li.sbon, where it is rare and is called 

 Leitao 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 Polpciro, in 1837. 



