Contributions to the Crustacean Fauna of South Africa. 397 



Antenna 2, 2nd joint toothed on outer margin, 5th joint smooth, 

 flagellum of a single joint, its lower margin with 2 rows of denticles 

 and a larger tooth at base of unguis. 



Peraeopods 2-4 short, 6th joint (not 5th) of peraeopod 4 reaching 

 beyond eyes. 



Peraeopod 5, 2nd joint about length of segment 4, but shorter 

 than the other joints together. 



Three pairs of marsupial plates, that on 4th segment with setulose 

 inset-piece extending nearly whole length of posterior margin. 



Concealed ram us of uropod with 4 setae. 



Length : 9 mm. ; breadth : 3 mm. 



Colour: In spirit yellowish, eyes reddish. 



Locality : ? Agulhas Bank. 3 ovigerous and numerous juv. 9 9 

 on Gorgonia albicans (J. L. Irvine). 1915 ; False Bay. 22 fathoms. 

 1 ovigerous $ . s.s. " Pieter Faure." 30/10/02. (S.A.M. Nos. A3884 

 and A4139.) 



This species is named in allusion to the most easily noticeable 

 difference between it and the preceding species. 



GEN. NEOAECTURUS Brurd. 



1914. Neoarcturus Barnard, Ann. S.A. Mus. vol. 10, pt. 7, p. 213. 



The discovery of the female shows that this genus is remarkably 

 close to Arcturus, differing only in the composition of the pleou and 

 the 3-jointed flagellum of antenna 2. 



NEOARCTURUS OUDOPS Brnrd. 



1914. Neoarcturus oudops Barnard, I.e. p. 214, pis. 18c and 19s. 



The original description was based on a single male and is confirmed 

 by an examination of the present specimens except in one point : the 

 male appendage was stated to be on the 7th peraeou segment, whereas 

 really it is on the 1st pleon segment. 



The female differs in no way from the male except in being broader 

 across peraeou segments 2-4 ; segment 4 is not longer than the others. 

 The sculpturing is the same, but more prominent than in the male, 

 especially the lateral tubercles on the posterior ridges. 



Maxilliped like that of , without vibratory plate. 



Peraeopod 2, 2nd joint a little longer than 4th joint. 



Three pairs of marsupial plates. Side-plates on segments 2-4 pro- 

 duced backwards and downwards as acute processes supporting the 

 marsupial plates. 



Pleopod 1, peduncle with two hooked spines on inner margin and 



