4 fishes collected p,y the '■' huxley " from 



Lycodidae. 

 Pteridium Alleni, Byrne.* 



The specimen on which this species was founded was taken at Station 

 VII. in about 444 fathoms. The specimen was taken with the Agassiz 

 trawl, which came up filled with large masses of coral. 



The original description and sketch of this species are (by the kind 

 permission of the editor of the Annals and Magazine of Natural History) 

 repeated below : — 



Form stout ; body compressed in caudal region, its greatest height 

 about 4 times in its length (without caudal fin). Head depressed, 3| 

 times in length (without caudal), nearly twice as long as broad, its 

 breadth about equal to its height at isthmus. Snout rounded, with 

 numerous mucous glands, about 4^- times in head. Eye of moderate 

 size, longer than the Hat interorljital space is wide, 6 times in head and 

 less than li times in snout. Gape 2f times in head, barely reaching 



Pteridium Alleni, x 1. 



beyond the level of the hind margin of orbit ; maxilla weak, and but 

 little expanded distally. Villiform teeth in both jaws and in a 

 V-shaped band on vomer. 



Marginal fins continuous, their bases covered with skin and scales ; 

 fin-rays difficult to count, probably D. ca. 90, A. ca. 55. Ventrals each 

 with two closely apposed rays. 



Body covered with a copious mucous secretion ; scales very small, 

 approximately 105 in a longitudinal and 35 in a transverse series. 

 Lateral line very indistinct and In-oken. 



Colour, after preservation, umber-brown, darker on top of head and 

 front part of dorsum, paler on belly. Eays of marginal fins dark. 



Length of type, 101 mm. (96 mm. without caudal). 



Hah. Mouth of English Channel, near La Chapelle Bank, ca. 

 450 fath. 



p. Allenif Byrne, Ann. Mag. Nat. Hist., Ser. 7, vol. xviii. p. 448 (Dec, 1906). 



