CYPRIDyE. 143 



Desmarest, in his ' Consid. gen. sur les Crust./ 1825, 

 although he gives a very good account of the different 

 genera, taken chiefly from Straus and Jurine, with an 

 account of twenty-one species, takes no notice of him 

 either; but Latreille, in the last edition of the 'Regne 

 Animal,' 1829, notices his memoir, with all due approba- 

 tion, and has thus contributed much to disseminate the 

 knowledge of his researches. Up to that period we know 

 of no original memoir upon this genus having been pub- 

 lished in this country ; Leach's article on the Crus- 

 tacea, in the 'Edinburgh Encyclopaedia,' containing no 

 details whatever, and only taking notice of one or two 

 species. 



In ] 835 I published a description of nine new species 

 in the 'Trans. Berw. Nat. Club;' and in 1837, in the 

 ' Magazine of Zoology and Botany/ I gave two additional, 

 all natives of this country. In the ' Transactions of the 

 Entomological Society/ vol. i, Mr. Templeton has de- 

 scribed two new species in the Mauritius ; and Koch, in 

 the ' Deutschlands Crustaceen/ 1837, 1838, has described 

 and figured no less than twenty-one new species, though 

 I am of opinion that several of them had been previously 

 described, and others are mere varieties. In 1841, Mr. 

 Haldeman, in the ' Proceedings of the Acad. of Nat. Sc. 

 at Philadelphia' has shortly described and figured in 

 outline two others, found in America. M. Lucas describes 

 another found by him in Algeria. 



Anatomy and Physiology. Ramdohr, Jurine, and 

 Straus all differ in many respects in describing the ana- 

 tomy of the genus Cypris, both as regards the nomen- 

 clature and the use of the parts. The last author who 

 has described them anatomically is M. Edwards ; and as 

 his definition of the organs of locomotion, &c. are more 

 consonant with our knowledge of other Entomostraca, 

 we shall follow him, taking the details, however, chiefly 

 from Straus, whose memoir stands pre-eminent amongst 

 those of his fellow-labourers. 



