DESCRIPTION OF SPECIES 295 



greatest breadth. From these facts it is clear that there is Uttle difference in the size of 

 the sexes, but the male is slightly broader in proportion to its length than the female. 



The body is broadly ovate with a sculptured surface of minute anastomosing ridges ; 

 the surface of the head and the tergal portion of the segments is covered with minute 

 scattered pits. The head is convex with a crescentic ridge in front of and between the 

 eyes and a second ridge extending across the head close to its anterior margin: a small 

 median rostrum is present. The eyes are placed in a postero-lateral position and are 

 rather small, reniform in shape, and contain black pigment. 



The thoracic somites are slightly convex and their coxal plates are compact ; those of 

 the third, fourth, and fifth are separated by sutures from their respective somites. The 

 coxal plates of the seventh somite do not extend as far as the distal extremities of the 

 pleural plates of the second abdominal segment ; each pleural plate of the third segment 

 extends slightly beyond that of the second to a point just beyond the distal end of the 

 protopodite of the uropod. 



The terminal segment ends in a trifid extremity; its dorsal surface is furnished 

 with a median longitudinal carina, extending to its tip, and on either side of this are two 

 lateral carinae which do not extend throughout the length of the segment but end in 

 freely projecting spines. Close to the lateral margin of the segment, on each side, is 

 another small carina which extends to a point just anterior to the base of the uropod. 



Remarks. There is little to add to the already existing descriptions of this species 

 except to point out that the last thoracic appendage of the aduh male, as figured by 

 Pfeffer {loc. cit., pi. iii, fig. 21), does not show the presence of numerous fine hairs along 

 the inner margins of the propodus and carpus and on the distal half of the merus. The 

 presence of these hairs was noted by Beddard (1884 h, p. 49) and they are undoubtedly 

 present. 



ColHnge (1918, p. 75, pi. iv, figs. 7, 9), in his description of this species, states that 

 there is only one variety of sensory spine present on the inner margin of the propodus 

 of the second thoracic appendage: this fact was noted as incorrect by Tattersall (1921, 

 p. 228), who confirmed Pfeffer's observations that two types were present. My own 

 observations agree with those of the two latter workers. 



Distribution. The original material of Miers was collected off the Crozet Islands, 

 Studer's and Collinge's specimens came from Kerguelen, and Tattersall's from Cumber- 

 land Bay, South Georgia. It is from this last locality that the specimens in the present 

 collection were obtained. 



9. Serolis kempi, n.sp. (Figs. 5, 6). 



Occurrence. St. 388: 56° 19^' S, 67° 09!' W, 121 m.; 3 <?(?, 6$? (b.), 7 immature. 



St. WS 86: 53° 53' 30" S, 60° 34' 30" W, 151-14? m-; 2 ^c?. 2 ?? (b-). 2 ?? (non-b.) and 3 

 immature specimens. 



St. WS 244: 52° 00' S, 62° 40' W, 253-247 m.; 6 3<S, 13 9? (b-). 6 ?? (non-b.), and n im- 

 mature specimens. 



St. WS 245 : 52° 36' S, 63° 40' W, 304-290 m.; i S, 5 ?? (b-). 33 immature specimens. 

 St. WS 795: 157-161 m.; I ? (b.). 

 St. WS 818: 52° 31' 15" S, 63° 25' W, 272-278 m.; I V (b.), 7 immature specimens. 



6-2 



