REPORT ON THE DEEP-SEA FISHES. 97 



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

 about as long as the eye. Back with narrow brownish cross-bars. 



This species is known only from a 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 of his Motella mediterranea (L.). But I have never seen a Mediterranean speci- 

 men of the same size and with equally large eyes. Also Hr. CoUett^ would refer it rather 

 to a species which he characterises by 62 dorsal, 21 pectoral, and 8 ventral rays ! 



Onus carpenteri (PI. XLII. fig. D). 



Motella macrophtlialma, Giinth., Ann. and Mag. Nat. Hist, 1874, vol. xiii. p. 139 (not 1867). 

 D. 49. A. 45. P. 23. V. 6. 



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

 the diameter of the eye two-ninths of the length of the head, as long as the snout and 

 longer than the 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 fin about as long as the eye. Coloration uniform. 



One specimen only is known, 4^ inches long, obtained during the cruise of H.M.S. 

 " Porcupine," in 180 fathoms, between Shetland and Fiiroe. I formerly regarded this 

 specimen as representing a more advanced stage of growiih of Onus macrojyhthahmcs, an 

 opinion fully in accord with the characters given above. But Dr. Liitken, in a recent 

 paper on the species of this genus,' has drawn attention to differences in the paired fins 

 which, if they are of specific value in this genus, indicate the distinctness of this 

 specimen from all the species known to me or described by Dr. Liitken. It is named 

 after Dr. Carpenter, whose memory will ever be associated with the " Porcupine " and 

 the succeeding British Deep-Sea Expeditions. 



Onus reinhardti (PI. XIX. fig. B). 



Motella reinhardi,* Collett, Forhandl. Vidensk. Selsk. Christ., 1878, p. 83. 



„ „ Liitken, Vid. MeddeL nat. Foren. Kjobenhavn, 1882, p. 236. 



Onos reinhardi, Collett, Norsk. Nordh. Exped. Fisk., p. 131, pi. iv. fig. 34. 



D. 53-59. A. 43-48. P. 22-24. V. 8. 



Barbels three. The length of the head is contained four and one-fourth times in the 

 total (without caudal), the diameter of the eye four times and two-thirds or five times in 



1 Vid. Mcddel. nat. Foren. Kj^benluivn, 1882, p. 244. 



2 Nyt Mag.f. Naturvid., 1884, p. 93. 



3 Vid. Mediiel. nat. Foren. Kjij>}ietihavn, 1882, p. 228. 



^ This fish remained uudescribeJ, and the name merely a MS. term, untd Collett undertook its examination 

 in 1878. 



(ZOOL. CUALL. EXP. — PART LVII. — 1886.) LH 13 



