I94 DISCOVERY REPORTS 



inferior margin of head. This is possibly not to be taken too seriously, as Strauss was 

 concerned with the eye-structure only, and, as mentioned elsewhere, was not a syste- 

 matise Nevertheless, in spite of the evident similarity in the eye-structure, I do not 

 think the present specimens should be identified with " Rhachotropis diploops", which 

 remains in any case a nomen nudum. 



Genus Eusirella, Chevr. 



Chevreux, 190S (Bull. Inst, ocean. Monaco, no. 121), p. 12. 

 Schellenberg, 1926 b, p. 228. 



Eusirella elegans, Chevr. 



Chevreux, 1908 (loc. cit.), p. 12, figs. 7, 8. 

 Schellenberg, 1926 b, p. 228, fig. 19 (valdiviae). 



Occurrence: St. 87. South-east Atlantic. 1 <$ 8-5 mm. 



Remarks. This specimen shows that both the Princess Alice and the Valdivia 

 specimens were but immature forms of the same species, the former possibly $, the 

 latter probably 6*. 



No trace of eyes. Telson with the lobes only distally dehiscent, apices acute, each with 

 a very minute notch and setule (only seen under high magnification) . 



Antenna 1, 1st peduncular joint with a small point on upper apex and a strong tooth 

 bearing two setae on lower apex; this tooth in lateral view is acute, but in ventral view 

 is chisel-shaped; 2nd joint with an apical point above, and two setae below, densely 

 calceoliferous on lower and inner surfaces, flagellum 18-jointed, calceoliferous, accessory 

 fiagellum not visible. Antenna 2, 4th joint on upper and inner surfaces, and 5th joint on 

 upper, lower, and inner surfaces densely calceoliferous, flagellum plump, 8-jointed, 

 calceoliferous. 



Gnathopods 1 and 2, palm with a row of spines and defined by two to three spines. 



Uropods, rami sparsely spinulose, with the margins very minutely serrulate. 



The locality of the ' Discovery' is close to that of the 'Valdivia'. 



Distribution. Azores, 38 N, 26 W, 0-2500 m.; South-east Atlantic, 3i°2i'S, 



9 46' E, 3000-0 m. 



Genus Rhachotropis, S. I. Smith. 

 Stebbing, 1906, p. 347. 

 Barnard, 1916, p. 178. 



As mentioned above (p. 193) Rhachotropis diploops, Strauss, 1909, besides being a 



nomen nudum, is not to be reckoned as belonging to this genus. 



Rhachotropis antarctica, n.sp. 



Occurrence: 1. St. 51. Falklands. 3 S3 7-10 mm., 6 ?$ (2 ovig. 1 with embryos) 7-9 mm. 



2. St. 144. South Georgia. ii??(i ovig. with embryos) n-13 mm., 2 immat. 8mm. 



3. St. 167. South Orkneys. 2 cfc? 10-11 mm., 5 ?? 13-14 mm., 2 immat. $$ 9 and 

 1 1 mm. Types. 



4. St. 170. South Shetlands. Fourteen specimens, mostly mutilated, incl. ovig. $$, 

 14-20 mm. 



