Fresh-Water Entomostraca from China and Sumatra. H 



expanded. Sculpture of shell very delicate, inferior edges 

 of valves fringed with small hairs. Eye rather large, with 

 very conspicuous crystalline bodies. Antennulæ unusually 

 short, when reflexed, scarcely extending to the base of the 

 labrum, fusiform in shape, and clothed behind with delicate 

 cilia. Antennæ and legs of the usual structure. Caudal part 

 rather large, partly uncovered by the carapace, præ-anal 

 portion scarcely attaining ^ of the length of this part, and 

 narrow conical in form ; anal denticles 8 on each side, the 

 outermost, as usual, bidentate; terminal claws without any 

 denticles at the base. Ephippium with only a single egg- 

 ampulla and very coarsely sculptured, surface partly tuber- 

 cular. 



Male much smaller than female and exhibiting the 

 usual sexual characters, head somewhat less produced than 

 in other species. 



Colour. — Body in both sexes highly pellucid, with a 

 more or less distinct bluish tinge ; ephippial ovum brick-red. 



Length of adult female about 1 m"\ of male 068 ™n\ 



Remarks. — This form looks rather like the European 

 species M. redirostris, Zaddach, having a much similar shape 

 of the head. It is, however, at once distinguished both from 

 this and all other known species by the unusually short 

 antennulæ of the female, a character which has given rise 

 to the specific name here proposed. Moreover the termi- 

 nal claws of the caudal part is devoid of any denticles at 

 the base, in which respect this form also differs from the 

 nearly-allied Sumatrense species, M. Weberi, Richard. 



Occurrence and Habits. — In one of my aquaria 

 prepared with mud from China this Moina appeared at 

 first only in some few specimens, which, however, rapidly 



