﻿South African Crustacea. 35 



1898. Saron marmoratus, Borradaile, Pr. Zool. Soc. London, p. 1009. 

 1906. Spirontocaris marmorata, Rathbun, U.S. Comm. Fish for 1903, 



pt. 3, p. 913. 

 1914. ,, gibberosa, Balss, Abhandl. K. Bayer. Ak. Wiss., 



Suppl. vol. 2, pt. 10, p. 46. 

 For this species Borradaile supplies an ample synonymy, 

 with explanatory discussion. Miss Eathbun supplements 

 Borradaile' s reference to Olivier by giving the page, and the 

 reference to the Atlas of the Encycl. M6th., vol. 24, pi. 319, 

 fig. 3, 1818 ; but appears to be unaware of the contributions to 

 the literature of the subject by Thallwitz and Borradaile. In 

 1904 Miss Eathbun enumerated no fewer than 51 species of 

 Spiro7itocaris as found in the Pacific, and exhibiting great 

 diversity in form. Since then two more species have been 

 added to that genus by Eathbun and two by Brashnikow, if 

 the generic name Euales, which he used for one of them, is to 

 be considered a synonym of Spirontocaris. According to 

 Caiman's synopsis in Spirontocaris (with several synonyms) 

 there are no arthrobranchiae on the peraeopods, only seven 

 jointlets in the wrist of the second peraeopods, and the man- 

 dibular palp is two-jointed. In Saron marmoratus I find the 

 mandibular palp three-jointed, so that at least that species is 

 properly withdrawn from Spirontocaris. But, as even the 

 numbers above mentioned do not show the complete series 

 of species at present assigned to that genus, it may eventually 

 prove desirable to make a much more extensive redistribution 

 of its members. 



The single South African, or rather South-east African, 

 specimen exactly resembles Dana's figure in the dentation of 

 the' carapace, but in addition has many tufts of feathered setae. 

 The mandibles have a long molar and four small distinct teeth 

 to the cutting edge. In the first maxillae the apex of the palp 

 is emarginate, with a strong spine on the inner corner. The 

 vibratory plate of the second maxillae is short, the apical plate 

 of the endopod narrow, tipped with one long and two short 

 setae, the intermediate lobes large, but the lower small, with 

 the upper division insignificant. In the first and second 

 maxillipeds the exopod extends much beyond the endopod and 

 in the second is attached to a joint compounded of the second 

 and third joints, with the fourth and fifth joints small, the 

 sixth and transversely attached seventh large. The long 

 third pair do not reach the end of the scale of the second 



