16G 



DEEP-SEA FISHES OF THE ATLANTIC BASIN. 



erably elevated; the length of its longest rays is about equal to that of the snout, from 

 which point it slopes rapidly to the tip of the tail. Tlii^ pectoral, placed high up in the 

 middle axis of the body, is inserted at some distance behind the gill openings, and is broad 

 and nearly oval in shape. Ventrals continent, some distance in advance of the vent, stout, 

 broad, ovate in form, not extending to the vent, but separated from it by a distance equal 

 to half their own length. Color, uniform light brown. 



Kadial formula: D. xi; A. xviii. 



This description is prepared from the types of Gill, (Cat. No. 3785G, U. S. N. M.,) from 

 Albatross station 2677, N. lat., 32° 39', W. Ion. 76° 50' 30", in 478 fathoms. The types, two 

 in number, measure Hi and 12i inches, respectively. Another specimen. Cat. No. 44246, U. 

 S. N. M., was obtained by the Albatross from station 2G76, in 32° 39' N. lat., 70° 01' W. Ion., 

 at a depth of 407 fathoms. 



NOTACANTHUS BONAPARTII, Risso. (Figure 185.) 



Notacanthus Bonaparte, Risso, Wiegm. Archiv f. Naturgescli. , 1840, 370, pi. x. 



Jfotavfiiilhiis llonapardi, Dk Fimppi & Veuany, Mem. Ace. Sci. Torino, xviii, 1857, 180. — Caxesthini, Pesci 



d'ltalia, 118. — Moreau, Hist. Nat. Poiss. France, 1881, 161.— Giglioli, Elenco, 3.3. 

 Notacunthun medllerranenn, De Filippi and Verany, Menior. Accad. Sci. Torin., 2nd series, xviu, IS.'iO. 190 (nota 



supra); Alcuni Pesci del MediteiTane<i, 1857, 3. — Guntiier, Cat. I'i.sh. Urit. JIus., in, 545. — Canestrini, 



Pesci d'ltalia, 1872, 118.— Moreau, Hist. Nat. Poiss. France, 1881, in, 158 (woodcnt). — Vaillant, Exp. 



Sci. Trav. et Tal., 317, 325 ; pi. xxvii. 



A N'otacanthus, with body slender, comparatively elongate, little higher over ventrals 

 than over pectorals; with its lateral line inconspicuous, nearer to the dorsal than to the 



Facsimile of iignre oi N'otacanthus Bonaparti in Risso's MS — From tracing by Profesaor Oiglioli. 



ventral outline, not arched anteriorly. Snout produced and compressed. Palatine teeth 

 in a single series. Ventrals joined by a membrane of considerable width between the 

 internal rays. The height of the body is about one-thirteenth of its length ; its thickness 

 about one-twentieth. Tiie tail does not appear to be in the least truncated, though so 

 described by certain authors, one of whom in his figure shows a tail carried to an acute 

 point, making the length of the body considerably greater in proportion to its height than 

 is indicated in his own description. Color, yellowish, with silveiy reflections; the limb of 

 the operculum, the margin of the orbit, and the mouth darkei'. 



Radial formula: D. vi-vii; A. xii-100-|-; V. ii,iii-6 (iv-8 according to De Filip))! and 

 Verany). 



This form was carefully figured and described by Risso in 1S40. He had a single speci- 

 men, 148 millimeters long, which he recognized as an inhabitant of abyssal depths (Scjoitr 

 abi/mcs marhics vaseu.r). By some error, his description and tigure, otherwise perfectly con- 

 sistent, disagreed in respect to the number of spines in the dorsal fin, the figure showing 

 seven, the description nine. Misled by this.De Filippi and Verany redescribcd the same fish 

 in 1859, and to justify their course proposed the theory that Risso's desciiption and figure 



