DISCUSSION OF SPECIES AM) THEIR DISTRIBUTION. 383 



Two young specimens (133 millimeters) were taken bythe Hirondelle, one in the gulf 

 i>f Gascony at a depth of 77 fathoms, the other off Cape Pinisterre in 200 fathoms. This 

 species resembles most closely 0. macrophthalmm, but 1ms a smaller head, and differs in 

 color and dentition. 



ONOS RELNHARDTII, (Kroyer), Coixett. 



Motella argentata, Reinhardt, Kgl. D. Vid. Selsk. Math. Nat. Copenhagen, 1837, ex. 



M, ,i,iu i Reinhardti, Kroyer, Ms. of about L852.-Coi.lett, Forhandl. Vidensk. Selsk. Christ., L878, 83. 



— LtJTKEN, Vid. Meddel, aat. Foren. Kj0benhavn, 1882, 236. 

 Onus Reinhardti, Collett, Norsk. Nordh. Exped., Fisk., p. 131, pi. rv. fig. 34; Vid. Selsk. Forh., 1891, No. 11, 



Christiania. — GOnther, Challenger Report, xxn, v. H7, pi. xix. Bg. B. 



Barbels, 3. The length of the bead is contained 1 1 times in the total (without caudal), 

 the diameter of the eye 4§ or 5 times in the Length of the head ; it is shorter than the snout, 

 equal to, or less in length than the interorbital space. The maxillary scarcely extends to 

 the hind margin of the eye. Both jaws and the vomer with an outer series of larger teeth. 

 Vent nearer to the root of the caudal than to the snout. The anterior ray of the first dorsal 

 tin rather longer than the eye. 



Radial formula: D. 53-59; A. 43-48; P. 22-2-1; V. S. Coloration uniform. {Gilnther.) 

 Several specimens were obtained in the Faroe Channel bythe Knight Errant in 540, 

 tius, and tilt) fathoms, and by the North Atlantic expedition in the open sea west of Bear 

 Island at a depth of 058 fathoms. Other specimens are known from Greenland. 



ONOS CARPENTERI, GOnther. 



Motella macrophthalma, GOnther, Ann. and Mag. Nat. Hist.. 1874, xiii, 139 (not 1867). 

 Onus Carpenteri, GOnther, Challenger Report, x.xn, 87, pi. xlii, D. — Collett, Vid. Selsk. Forhandl., 

 Christiania, 1891, No. 11. 



Barbels, .;. The length of the head is two-ninths of the total (without caudal): the 

 diameter of t'ae eye two-ninths of the length of the head, ashing as the snout, and longer than 

 interorbital space is wide. The maxillary reaches to a little behind the hind margin of the 

 orbit. Both jaws with teeth unequal in size, some being enlarged and canine-like. Vent 

 much nearer to the snout than to the end of the anal. The anterior ray of the first dorsal 

 tin about as long as the eye. 



Radial formula: 1). 4!t; A. 45; 1\ L'3; V. 6. Coloration uniform. (Gimther.) 

 One specimen only is known, 44 inches long, obtained during the cruise of H. M. S. 

 Porcupine, in 180 fathoms, between Shetland and Faroe. Collett writes that he formerly 

 regarded this specimen as representing a more advanced stage of growth of Onos macro 

 j> lit halm us. 



ONOS TRICIRRATUS, (Bloi h), Goode am. Bean. 



Gadus tricirratus, Bloch, Ichthyologie, pi. ci.xv. 



Motella irieirrata, Nilsson, Prod, is; Skand. Fauna, iv, 586. — Vaillant, Travailleur et Talisman, 1888, 285. 



Snout obtuse, broad, rather depressed, with 3 barbels, one at each of the anterior nos- 

 trils, the third at the chin. Teeth villiform and of equal size in the upper jaw. A series 

 of white dots along the lateral line (generally). (Giinther.) 



The "Three-bearded rockling, " which occurs along the coast of Europe from Scandi- 

 navia to the Mediterranean, was found by the Talisman oil' Soudan at the depth of 640 

 meters (station lxxi), as well as by the Travailleur along the coast, of Morocco at 112 

 meters [station xxxiv). 



RHINONEMUS, Gill. 

 Bhinonemus, Gijll, Proc. 1'. S. Nat. Mus., 18(53, 230. — Jordan and Gilbert, Bull., xv, I", s. Nat. Mus., 7J7. 



Onine gadoids having a barbel at the snout as well as one at each nostril and one at 

 the chin. Head high auteriorly and compressed. Mo large canines. 



