344 BRITISH ENTOMOSTRACA. 



roach, in many of our ponds and rivers, in great abund- 

 ance." (Barbut.) I have not seen any specimens of this 

 species. 



Genus 2 — Lernea. 



Lern^a, Linnmus, Midler, 0. Fabricius, Oken, Cuvier, Lamarck, Burmeister, 



Kroyer, M. Edwards. 

 Leiineocera, Blainville, Nordmatm. 



Character. — Body more or less twisted, and outre in 

 appearance. Head furnished with horn-shaped append- 

 ages, which are irregularly branched. Ovarian tubes 

 twisted into round masses, and placed under the posterior 

 portion of the body. Abdomen of considerable size. 



The genus Lernea is now restricted within very small 

 limits. EstablishedbyLinna3us upon the Zer;/e«(^r«;?c/r/«^/,s, 

 it is at the present day confined to that species and one or 

 two others. 



Blainville retained the genus Lernea, however, for some 

 other species, some of which, as Lernea c^clojjhora (vide 

 supra, p. 340), are inadmissible altogether, and others, as 

 Lernea Basteri, founded upon a figure given by Baster, 

 are very doubtful. The name Lei-nea was retained by 

 him, he says, " for those species which have no trace of 

 appendages to either the head or the body ; those, in fact, 

 which are most deformed." Burmeister, Kroyer, and 

 M. Edwards, how^ever, agree in referring the genus to the 

 species first described by Linnaeus as the type, and have 

 assigned to it its characters accordingly. 



Lernea branchialis. Tab. XXXV, fig. 12. 



Lern.ea beanchialis, Linnmus, Syst. Nat., edit. 12th. 



— fjamarck, An. s. Vert, iii, 240. 



— Cuvier, Regue An., iii, 256. 



— Burmeister, Nov. Act., xvii. 



— Gueriti, Icon. Rcgne An. Zoopli., t. 9, f. 1 ; 



Encyc. Britann., edit. 7th, xxi, t. 502, f. 13. 



