110 Annals of the South African Museum. 



Acontiostoma marionis Stebb. (including A. magellanicum Stebb.), in 

 the shape of the 1st side-plate. This is triangular, not oblong, and 

 narrows below to a somewhat blunt point. The whole surface is finely 

 pubescent, and the inferior and posterior margins of the side-plates are 

 more setulose than in 8. pepinii. Peduncular joints of 1st antennae 

 progressively shorter, flagellum inserted obliquely, 4-jointed. Second 

 antenna as figured for 8. pepinii. First maxilla apparently without 

 palp ; 4th palpal joint of maxilliped quite rudimentary. Finger of 

 2nd gnathopod inserted in the middle of the distal margin of 6th 

 joint, i.e. the apices of this joint are produced equally above and 

 below the finger. Postero-inferior apex of 2nd joint of 5th peraeopod 

 rectangular, with a small indent just above the apex on the posterior 

 margin. Posterior margins of 2nd joints of 3rd-5th peraeopods 

 strongly setulose. 



In other respects agreeing with 8. pepinii. The specimen is not 

 full-grown, as shown by the new integument forming within the old. 



Length : 2'5 mm. in contracted position. 



Colour . In spirit, pale pinkish, eyes reddish. 



Locality : False Bay. 24 fathoms. 1 immature specimen. 

 s.s. " Pieter Faure." 11/11/02. (S.A.M. No. A3815.) 



GEN. EUONYX Norman. 



1867. Euonyx Norman, Eep. Brit. Ass. vol. 36, pp. 197, 202. 



1888. Stebbing, Challeng. Eep. vol. 29, p. 668. 



1891. G. 0. Sars, Crust Norw. vol. 1, p. 116. 



1906. Stebbing, Das Tierreich 21, p. 19. 



1908. Chevreux, Bull. 1'Inst, Ocean. Monaco, no. 117, p. 1. 



EUONYX BISCAYENSIS Chevreux. 

 1908. Euonyx biscayensis Chevreux, I.e. p. 1, fig. 1. 



Eyes invisible in the spirit specimen. 



Fourth pleon segment with a basal depression, the posterior portion 

 slightly swollen, rounded. 



First antenna equal to first two peraeon segments together, 1st joint 

 with anterior margin slightly emarginate, but not apically produced, 

 flagellum 12- jointed, 1st joint equal to peduncle, accessory flagellum 

 5-jointed, 1st joint equal to the remaining 4 joints. 



Second antenna equal to first 3 peraeon segments together, 1st joint 

 dilated below, gland-cone subacute and extending almost to end of 



