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^ea, Linnaeus, Muller, 0. Fabricius, Olcen , Cuvier , Lamarclc , Burmeister, 
Kroyer, M. Fdwards. 
Lerneocera, Blainville , Nordmann. 
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. Establishedby Linnaeus upon the Lernea branchialis , 
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 cyclojphora (vide 
supra, p. 340), are inadmissible altogether, and others, as 
Lernea Basteri , founded upon a figure given by Baster, 
are very doubtful. The name Lernea 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, however, 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. 
Lernea branchialis, Linnaeus , Syst. Nat., edit. 12th. 
— Lamarck , An. s. Vert, iii, 240. 
— Cuvier , Regne An., iii, 256. 
— Burmeister , Nov. Act., xvii. 
— Guerin , Icon. "Regne An. Zooph., t. 9, f. 1 ; 
Encyc. Britann., edit. 7th, xxi, t. 502, f. 13. 
