294 DB. a. S. BEADY OIT EITTOMOSTKACA. 



Pabt I. — Fresh-water Species. 



Subclass ENTOMOSTRACA. 



Legion BRANCHIOPODA. 



Order PHYLLOPODA. 



Family Limnadid^. 



Grenxis Limnadia, Brongniart. 



LiMNADiA HiSLOPi {Baird). (Plate XXXYII. figs. 1-3.) 



Estheria Hislopi, Baird, Proc. Zool. Soc. 1869 (Annulosa), pi. 63. 

 fig. 1. 



The Colombo specimens have been kindly compared for me by 

 my brother, Mr. H. B. Brady, F.E.S., with the type specimens 

 in the British Museum ; there seems to be no appreciable dif- 

 ference except in the point of size, the types being somewhat 

 larger. The Ceylon examples, however, are probably young ones, 

 the shell being simply granular and showing no concentric ribs 

 except in the largest of the lot, where the ridges are faintly 

 visible. The smaller antennae are distinctly club-shaped, a cha- 

 racter which refers the animal to Limnadia rather tlian Estheria. 

 Length y-^-^- to ^inr of an inch (2-3 millim.). 



Order CLADOCERA. 



Family Daphnid^. 



Genus Moina, Baird. 



MoiNA suBMTJCEONATA, n. sp. (Plate XXXVII. figs. 4, 5.) 

 The cervical constriction is not neai4y so deep as in the published 

 figures of other Moince ; the head is upright and subtriangular ; the 

 dorsal margin of the carapace almost straight, the ventral strongly 

 arched, and forming at its junction with the posterior margin a 

 more or less distinctly mucronate angle ; posterior extremity 

 truncated, but well rounded at the dorsal angle. Length (exclu- 

 sive of antennae) -^ of an inch (1 millim.). 



Family LvNCODAPHNiDiE. 



G-enus Iltocetptus, Sars. 



Iltocetptus Halyi, n. sp. (Plate XXXYII. figs. 6-9.) 

 The head is obtusely angular at the apex, not rounded ; 



