I'lIYLLOrOD CRUSTACEA 35 



closely related. B. fcrox is proportionately much more slender, and averages considerably 

 longer; the gill of the last pair of limbs appears not to be setiferous (from the descriptions — 

 I have no specimens at hand) ; the cercopods of the i are always outcurved, and their outer 

 margins bear setae only near the tips ; in the 2 there is not a well-marked notch between the 

 body of each 2nd antenna and its apical point; and the ovisac extends beyond the 3rd post- 

 genital segment. Moreover, B. fcrox has not Ijeen reported from central and eastern Asia, 

 as it should have been if only environmental variations separate the two. B. oricnfalis has 

 been reported from Russia and even Hungary, but both these records (especially the latter) 

 I consider very doubtful. From analogies with the development of other anostracans, it 

 appears very likely that adults of B. oricnfalis will resemble somewhat juvenile B. fcrox even 

 more closely than they resemble the adults of that species. From some of Daday's figures 

 especially it seems possible that he has confused young specimens of B. fcrox with B. oricntalis. 



Family Chirocephalidae Daday 

 1910 Chircoccl^halidac Daday, Ann. Sci. Nat. (ser. 9) 11:175 



Eleven pedigerous, 9 postpedigerous segments. S with biarticulate 2nd antennae, with 

 separate basal joints. In $ basal joints of 2nd antennae bear 1 or more fleshy processes; or 

 if not, the head bears a median frontal process; or there may be a frontal process as well as 

 fleshy processes on the basal joints of the 2nd antennae. Legs with 1 or 2 epites. Cercopods 

 movably articulated with last abdominal segment (except in 'riianiuoccpJntlus) . Ovisac 

 usually more or less flask-shaped. Distribution world wide. 



This is probably the least homogeneous of the families of Anostraca as defined by Daday. 

 This author further sulidivides it into 3 sub-families (which will not be treated here), but 

 even with this division certan genera assigned to it by Daday will probably have to be 

 removed to other families when they are more fully studied. The single Indian genus is close 

 to Chiroccphaliis, and will certainly remain in the same family, whatever the taxonomic 

 future of the group as now defined. 



Genus Pristiccfluiliis Daday 

 1910 rristiccphalus Daday, Ann. Sci. Nat. (ser. 9) 11:213 



^'Vbdomen without furca,_usually shorter than trunk. Alxlomen of £ unarmed, in ? 

 bearing various sorts of spines, usually at posterior margins of the segments. Margins of 

 cercopods setiferous, never spiniferous. Male without frontal process. Basal joint of 2nd 

 antenna of S often with a subspherical or cylindrical setuliferous process, and always with a 

 pointed serriform process which is generally carried more or less coiled. Legs wilh 2 epites, 

 except that last pair may have only 1, or the proximal eijite of last leg may be much reduced. 



Four species are known, occurring in parts of North Africa, Europe, Western and Cen- 

 tral Asia. The species most closely resembling the one found in the Indian region is P. jose- 

 phinae, which is found in Eastern Russia and in Siljeria, and hence is the nearest geographi- 

 cally as well. 



