382 DEEP-SEA FISHES OF THE ATLANTIC BASIN. 



normal; tlic supniinaxillary ends uiidor the posterior margin of tlie pupil. The tcctli are 

 ill a narrow band in Itoth jaws and some of those at least in the outer row of npjxT Jaw arc 

 slightly enlaryod and l)rownisli colored. The teeth of the vomer form a short eur\ed band in 

 two rows. The nasal barbel about equals the diameter of the eye. The chin barbel is 

 small and does not much exceed one-half the diameter of the eye. 



The forenu)st ray of the first dorsal springs from the back above opercular margin. 

 The second dorsal tin is low in front but rises rapidly to the seventh or eighth rays behind 

 which it is nearly uniform for a long distance and the highest at posterior portion. 



The anal tin is much lower than the second dorsal. The caudal is slightly emarginate, 

 almost truncate behind, and its median rays are about two-thirds as long as the head. 



The pectorals are nearly three-fourths as long as head and are produced toward the 

 upner angles, the third ray being longest. 



The ventral tins have their basis mostly in advance of the pectorals, and tlie longest 

 ray is tilamentous and nearly equals the iiectoral. 



Tlie lateral line is obsolescent. 



The ^^fta^rosA' obtained specimens of this species from the following localities: Cat. 

 No. 33430, U. S. K M., from station 2072, in 41° 53' N. lat., G5^ 3.3' \V. Ion., at a depth of 

 8o8 fathoms; Cat. No. 35G00, U. S. N. M., from station 2206, in 39° 35' N. lat., 71° 24' 30" 

 W. Ion., at a depth of 1,043 fathoms; Cat. No. 33207, U. S. N. :\I., from station 20.-)l, in 39° 

 41' N. lat., 69^ 20' W. Ion., at a depth of 1,100 fathoms, and from station 2550, in 39= 44' 30" 

 N. lat., 70° 30' 45" W. Ion., at a depth of 1,081 fathoms. 



ONOS MACROPHTHALMUS, GCntuer. 



MotcUa macropthalma, Guntheu, Ann. iniil Mas- Nat. Hist., 1867, xx, 280, pi. v., ii};. I?. 

 Onus macrophthdlmiis. Oi'NTiiicR, CIiallcnKor Report, xxii, 96. — C'ollett, Unll. Soc Zoiil. Fr.ancc, xv, 1800, 

 108; Via. Selsk. Foihandl., 1891, No. U. 



"Barbels, three. The length of the head is one-fourth of the total (without caudal). 

 The diameter of the eye is one-fourth of the length of the head, as long as the snout, and 

 much longer than the interorbital space is wide. The maxillary reaches the hind mar- 

 gin of the orbit. Both jaws with teeth unequal in size, some being enlarged and canine- 

 like. Vent nearer to the snout than to the end of the anal. The anterior ray of the tirst 

 dorsal about as long as the eye." 



Radial formula: D. 55; A. 55; P. 17; V. 5. Back with narrow brownish crossbars. 



This species is known oidy from ai single example, 3 inches long, obtained in 80 or 90 

 fathoms, near the Hebrides. Dr. Liitken gives it as his opinion that this represents the 

 young oi Motella meditcrranca, but this view is disproved essentially by Collett. 



ONOS BISCAYENSIS, Collett. 



Onus biscayensis, Collett, Bull. Soc. Zoijl. France, xv, 1890, 107. — Vid. Solsk. Forhaudl., Chri-stiania, 1891, 

 No. 11. 



Body elongate, its height 9 times or a little more in its length; head small, 5J in total, 

 4f in total without caudal. Height of caudal ])eduncle 4 times in le:igth of head. Eye 

 large, its diameter 3^ in length of head, exceeding in length the width of the interorbital 

 space, the length of the snout, and that of the tirst dorsal. Barbels, 3 (two nasal, one man- 

 dibular). 



Vent nearer to the tip of the snout than to the extremity of the anal by a space equal 

 to the length of the snout. 



Base of tirst dorsal twice in length of head and a little longer tlniii distance of its origin 

 from snout. Pectoral reaches nearly to origin of second doisal. 



Intermaxillary teeth in bands, a single jironuiRMit canine on each side. 



Color, brownish; second dorsal and caudal with brown bands. 



Radial formula: D. .54; A. 44; P. 17; 15.0. 



