Contributions to the Crustacean Fauna of South Africa. 391 



B. Width of 4th segment in 5 greater than length. Body in both 

 sexes depressed. Flagellum of antenna 2 1- jointed. 



i. Segment 4 in 9 tuberculate . . . pustulata u. sp. 

 ii. Segment 4 in 9 u t tuberculate. 



a. Outer margin of 2nd joint of antenna 

 2 entire. Peraeopod 5 (in $ at least) 

 with 2nd joint longer than all the other 



joints together ..... longipes n. sp. 



b. Outer margin of 2nd joint of antenna 

 2 notched. Peraeopod 5 with 2nd joint 



shorter than all the rest together . brevipes n. sp. 



ARCTURELLA CORNIGER (Stebb.). 



1873. Arc-turns corniger Stebbiug, Ann. Mag. Nat, Hist. (4), vol. 12, 



p. 96(9). 

 1908. Arcturella (7) id. I.e. p. 51. 



1913. Antarcturus ornatus Tattersall, Tr. Roy. Soc. Ediub. vol. 49, 



pt, 4, p. 889, pi., fig. 5 ( $ ). 



1914. Arcturus (7) corniger Barnard, Ann. S.A. Mus. vol. 10, pt. 7, 



p. 207. 

 1914. Arcturopsis hirsutus id. ibid. p. 207, pi. 19A ( $ ). 



At the time I described A. hirsutus I was not aware of the publica- 

 tion of Tattersall's paper, and in comparing the species with Stebbing's 

 corniger I pointed out certain characters which then seemed to me to 

 distinguish the two species. Further examples have since been dis- 

 covered among the " Pieter Faure " collections which enables me to 

 establish the above synonymy. 



In the first place a comparison of the figures of ornatus and hirsutus 

 leaves no doubt that they are couspecific. 



Secondly, the new material shows the extreme variability of the 

 dorsal tubercles and setae on the 4th peraeon segment of the $ , thus 

 affording a series uniting all three forms. 



Setae in $ seem to be normally present, though varying in quantity, 

 but frequently the body is perfectly glabrous. The anterior median 

 tubercle is not as large in any of my specimens (except one from 

 Sebastian Bluff) as in Stebbing's example, but is usually present, 

 though absent in the specimens described as hirsutus. The apices of 

 all the tubercles vary from pointed to blunt. The three posterior 

 tubercles show the greatest amount of variation. They may be low, 

 rounded-topped knobs, or moderately high blunt tubercles or high spini- 

 form projections. This last form is shown in the figure of hirsutus, 



