200 E. W. SEXTON. 



Eecorded once before from the Bay of Biscay by Chevreux as 



Guerinella niccecnsis (15). 



Gen, Ichnopus, A. Costa. 



Iclinopus spinicornis, Boeck. 



(Stebbing, Das. Tierr., p. 52.) 



Station X. Six specimens, all females, the largest measuring 13 mm., the 

 others small, averaging 5 '5-6 mm. in length. 



This species has been recorded before from the Bay of Biscay, 

 trawled twice by the Hirondelle (Chevreux (14), p. 15), and once by 

 the Britcmnia (Walker, (46), p. 159). 



Gen. Tmetonyx, Stebbing. 

 Tmetonyx similis, G. O. Sars. 

 Station II. One specimen, an ovigerous female, measuring 18 mm. 



This specimen is a very large full-grown female, which has apparently 

 developed the secondary sexual characters of the male. Tattersall has 

 recorded a similar instance in his recent paper on Schizopoda [Fisheries, 

 Ireland, Sci. Invest., 1910, II [1911], p. 16), in which a full-grown 

 ovigerous female had assumed the rostrum characteristic of the adult 

 male. 



The Huxlci/ specimen agrees in every particular with Sars's descrip- 

 tion and figures (30), p. 93, pi. 33, with the exception of the 

 antennae. Sars's description of the flagella is as follows : In the 

 superior antenna " flagellum more than twice the length of the ped- 

 uncle, and composed of about twenty articulations, the first of which 

 is rather large, about equal in length to the four succeeding ones 

 combined ; accessory appendage scarcely attaining one-third of the 

 length of the flagellum and six articulate. Inferior antennae but little 

 longer than the superior, flagellum composed of about twenty-four 

 articulations." In the specimen examined the first joint of tlie^??"imfr/-?/ 

 flagellum equalled in length the six following joints taken together; 

 19-jointed ; accessory fiagellum 7-jointed. The inferior antenna was 

 twice the length of the superior ; flagellum composed of 42 joints. 

 Both pairs of antennae were calceoliferous, one calceolus on each joint, 

 from the 5th-16th in the superior ; and in the inferior from 

 the 3rd-24th, then on alternate joints to the 30th. The calceoli do 

 not form a continuous row, but alternate in the same way as those 

 of the Trypliosa. antennipotens figured by Stebbing in his Challenger 

 Eeport, pi. 6. 



This is the first record of the species from the Bay of Biscay. 



