226 



DISCOVERY REPORTS 



lower margin of apex between the rami, rami acuminate, spinulose on upper margins. 

 Uropods 2 and 3 similar to uropod 1 , but without the strong spine on apex of peduncle ; 

 rami subequal to peduncle. 



Colour (as preserved); ground colour whitish, with purple patches on head, peraeon 

 and pleon, side-plates, and 2nd joints of peraeopods 3-5, the patches on the body more 

 or less in the form of transverse bands. Colour of no. 1 is given as "very pale yellow 

 blotched and mottled with brown, eyes pale grey". 



Remarks. This extraordinary species may remain in the genus Eurystheus. Its 

 general appearance is that of a species of this genus, though sexual dimorphism has 

 been carried to an extent found in no other species. The 2nd side-plate resembles that 

 of Megamphopas cornutus (Sars, 1895, pi. xx). 



Eurystheus purpurescens, n.sp. (Fig. 140). 



Occurrence: 1. St. 39. South Georgia. 1 S 9 mm., 1 $ 11 mm., 1 immat. $ 8 mm. 



2. St. 167. South Orkneys. 2 S3 20 mm. Type 3- 



3. St. 190. Palmer Archipelago (90-130 m.). 1 ovig. $ 8 mm. Type $. 



Description. In general appearance and coloration similar to ditnorphus, but eye 

 slightly larger, post-antennal angle of head quadrate, 2nd peraeon segment only half as 



b 



Fig. 140. Eurystheus purpurescens, n.sp. a, b. Gnathopods 1 and 2 (both viewed 

 from inside), c. 2nd joint of peraeopod 5, with hind margin further enlarged. 



long again as segment 1, and no denticles on any of the pleon segments. Telson with an 

 apical spinule as well as one on each lateral corner in 3, only the lateral ones in ?. 



Epistomial spine strong, moderately long. 



Antenna 1, flagellum in <$ 39-jointed, accessory flagellum 8-jointed. Antenna 2, 

 flagellum in S 27-jointed. In ? flagella of both antennae 15-jointed, accessory flagellum 

 6-jointed. In S of no. 1 flagellum of antenna 1 16-17-jointed, accessory flagellum 

 5-jointed, of antenna 2 15-jointed; in the ? of no. 1 the numbers are respectively 14, 4 

 and 14. 



