1889.] ON SOME FEESHWATEE OSTEACODA AND COPEPODA. 53 



very large and vaulted. 1st pair of maxillae with palps and 

 masticatory lobes narrow and elongate; 2nd pair without any 

 branchial lamella. Legs about as in Cypris. Caudal rami 

 extremely small and narrow, but of quite normal structure, claws 

 slender and setiform, 3 on either ramus, besides a very small 

 apical bristle. Propagation exclusively partenogenetical. 



Remarks. — This genus has been established by Mr. Brady 

 to comprise the 3 northern species Cypris vidua Miiller, C. 

 aciihata Lilljeborg, and C. villosa Jurine. The 2 latter species 

 I have, however, found to differ materially from the first one, in 

 certain well-marked characteristics, and more especielly in the 

 structure of the caudal rami, and, as another genus, Potamo- 

 cypris, has been proposed for a form very nearly related to the 

 last named species (C. villosa), it will, I believe, be appropriate 

 to restrict the genus Cypridopsis to those forms, which more 

 closely agree with the northern species Cypris vidua Miiller. 

 The genus would seem to embrace numerous species, both northern 

 and foreign. In the following pages a well-marked Australian 

 species will be described, and another very distinct species I 

 have succeeded last year in raising from dried Chinese mud. Mr. 

 Brady has, moreover, described, though rather insufficiently, 4 

 other exotic forms, 2 from Australia and 2 from Ceylon. Finally 

 several northern species have recently been established, though 

 not yet published, by Prof. Lilljeborg, two of which I have my- 

 self been enabled to examine in the neighbourhood of Christiania. 



The species are easily recognised by the very tumid, al- 

 most globular shell, the colour of which is generally, but not 

 always, whitish banded with dark green. 



7- Cypridopsis globulus, n. sp. 



(PI. II, figs 9, 10; PI. VII, figs 1-11). 



Specific Characters. — Shell seen laterally rounded triangu- 

 greatest height in the middle exceeding 2 / 3 of the length, 

 nor extremity obliquely rounded, posterior somewhat lower 



