Fresh-water Entomostraca of South America. 15 



D. Sarsii was raised, having been taken at Itatiba, located 

 at some considerable distance from Sâo Paulo. 



Fain. DapJmidæ. 



Gen. Moinodaphnia, Herrick. 

 Syn: Paramoina G. O. Sars. 



Generic Characters. — Female. Carapace 

 sub-compressed, carinated dorsally, and terminating behind 

 in an obtuse point, valves well developed, admitting of 

 the complete covering of the tail, free edges arcuate and 

 minutely denticulate. Head comparatively small, sub-erect, 

 well defined from the carapace, fornix rather fully developed, 

 rostral projection very slight. Eye located within the 

 projecting frontal part; ocellus distinct. Antennulæ slender, 

 mobile, resembling those in Moina. Antennæ not very 

 powerful, basal part with an elongated seta between the 

 insertions of the rami, the latter slender, with the usual 

 number of natatory setæ, apical spine of upper ramus 

 unusually prolonged. Structure of legs nearly as in Moina. 

 Tail likewise built upon the very same type, its distal part 

 being abruptly attenuated, and clothed on each side with a 

 series of very delicate ciliated spinules, succeeded at the 

 end by a simple, much stronger, unciliated and bidentate 

 spine. Dorsal process occluding the matrix behind well 

 marked, triangular, concaved in front. Male unknown. 



Remarks. — This genus was established in the 

 year 1887 by Mr. C. L. Herrick, to comprise a North 

 American species M. alabamensis Herrick. The genus 



