LERNEOCERA. 
343 
belonging to this genus. In his 'Fauna Suecica/ 1746, 
he describes a species found in Sweden on the carp ; a 
species which Barbut, in 1783, ascertained to be British. 
Hermann also, in 1783, describes and figures another 
species, and several have since that time been added to 
the list. 
Blainville, in his Monograph, so often quoted, formed 
the genus Lerneocera to receive several species which had 
then been described, and amongst others the species found 
by M. Surriray, of Havre, which led to the first notice of 
the young of the Lerneadse. 
The genus, as established by Blainville, contains two 
species, which have been separated from it by Kroyer and 
M. Edwards ; but still it has been retained in a restricted 
sense by all succeeding authors. 
Lerneocera cyprinacea. Tab. XXXV, fig. 13. 
Lern^ia cyprinacea, Linneeus, Faun. Suec., No. 2100, t. 2, f. 2100 ; 
Syst. Nat., edit. 12th. 
— Barbut , Gen. Vermium, t. 7, f. 3. 
— Turton, Brit. Faun., 137, No. 105. 
— Lamarck, An.-s. Vert., iii, 230; Enc. meth., 
Vers, t. 78, f. 6. 
Lerneocera cyprinacea, Blainville , Journ, de Phys., xcv, 3 77. 
— Desmarest , Cons. gen. Crust., 346. 
— Burmeister , Nov. Act. Nat. Cur., xvii, 
309, t. 14 a, f. 1-3. 
— M. Edwards , Hist. Nat. Crust., iii, 527. 
Head furnished with four horn-shaped appendages, 
which are somewhat long and slender. The two outer or 
posterior are bifurcated ; the anterior simple. 
The thorax is very slender anteriorly, forming a long 
neck, but becomes much broader posteriorly, and when it 
terminates in the small abdomen, appears obliquely trun- 
cate. The oviferous tubes are cylindrical, and rather long. 
The length of the whole animal is about eight lines. 
Hah . — “ Found on the sides of the carp, bream, and 
