South African Crustacea. 27 



The late Monsieur Jules Bonnier has given (loc. cit.) an elabo- 

 rate bibliography of this small species. The specimen which I 

 now assign to it was without the first and second peraeopods, 

 and the third and fourth, though present on one side, were only 

 in a state of recuperation. It was otherwise in good condition 

 and probably adult, the carapace being 8 mm. long, therefore 

 near to the size of 9 mm., which Bonnier gives as its measure- 

 ment in an adult male. There are some slight differences in 

 detail. Behind the rostral region on the median line of the 

 carapace Bonnier gives only a couple of spinules placed trans- 

 versely. In the African specimen there are four. The eyes are 

 rather stouter. In the first antennae the two sharp prolonga- 

 tions of the characteristic basal joint have each below the apex 

 a long spine which reaches well beyond the apex of the prolonga- 

 tion, in place of the seta which in Bonnier's figure does not reach 

 the apex. Bonnier finds the telson divided into two symmetrical 

 halves by the distal groove. The African specimen shows a slight 

 inequality in the two lobes. These small variations, apart 

 from possible differences in the missing peraeopods, can have 

 no specific importance, since the mouth-organs as well as the size 

 and superficial details all conform to the northern standard. 



Locality. Seal Island, W.S.W. (Mossel Bay). No. 238. 



MACRURA GENUINA. 



TEIBE THALASSINIDEA. 



FAMILY AXIIDAE. 



GEN. CALOCAEIS, Bell. 



CALOCARIS ALCOCKI, McArdle. 



Plate XCI. 



(The discussion of this species appeared last year (1915) in these 

 Annals, vol. 15, pt. 2, p. 59.) 



TRIBE ERYONIDEA. 



(See General Catalogue of S.A. Crustacea, p. 377.) 

 FAMILY ERYONIDAE. 



1910. Eryonidae, Stebbing, Ann. S.A. Mus., vol. 6, pt. 4, p. 377. 

 1914. Selbie, Fisheries, Ireland, Sci. Invest., pt. 1, p. 8. 



1916. de Man, Siboga Exp., vol. 39a, p. 1. 



