224 



DISCOVERY REPORTS 



obviously close. The ist gnathopod resembles most nearly that of africana, Schell., but 

 apparently in the latter the 2nd joint of both gnathopods has neither process nor lobe, 

 and the hand of gnathopod 2 is different. 

 Distribution. Southern coast of South Africa to Natal, 25-47 fathoms. 



Genus Eurystheus, Bate. 

 Stebbing, 1906, pp. 610, 738; 1910, p. 613. 

 Barnard, 1916, p. 249; 1925, p. 361; 1930, p. 391. 

 Tattersall, 1922, p. 10. 

 Schellenberg, 1925, p. 176; 1926, p. 375; 1931, p. 236. 



There seems to be a never-ending influx of forms in this genus as each fresh expedi- 

 tion brings home its captures. Undoubtedly the simplest way to deal with these forms 

 is to give specific names to each, rather than to assume local variability on the part of 

 one and the same "species". 



Eurystheus dimorphus, n.sp. (Fig. 139). 



Occurrence: 1. St. 45. South Georgia. 1 immat. $ 13 mm., 1 immat. $ 15 mm., 1 ovig. $ 22mm. 



2. St. 123. South Georgia. 7 $$ 16-19 mm. 



3. St. 140. South Georgia. 4 immat. $$ 14-15 mm., 11 $$ 14-18 mm. 



4. St. 144. South Georgia. 1 $ 15 mm. 



5. St. 148. South Georgia. 1 immat. $ 15 mm., 4 $$ 12-15 mm. 



6. St. 149. South Georgia. 4 $<$ 18-24 mm., 4 ?? 18-24 mm. Types. 



7. St. 154. South Georgia. 1 $ 18 mm. 



7""' I ' r "-^\ b. 



Fig. 139. Eurystheus dimorphus, n.sp. a. Peraeon segments 1-3, with side-plates and gnathopods 1 and z&. 

 b. Gnathopod 2 ?. c, d, e. Peraeopods 3, 4, 5 respectively, J, with cross-section of 4th joint of peraeopod 5. 

 /. Telson. 



