LYNCEIDiE. 
115 
of the internal cavity of the shell immediately behind 
the muscle is apparently empty, except at the season of 
spawning, when it is full of ova or young. 
The posterior part of the body is produced in the 
middle into a strong, pointed spine. 
The feet are much thicker than those of the Daphnise, 
and the construction of these organs appears to establish 
a passage from the Cladocera to the Copepoda, 
The habits of this animal are extremely active, and very 
similar to those of the Daphniae. They form part of the 
food of the herring. 
Hab . — Firth of Forth; H. Goodsir. - 
Family 3 — LYNCEIDiE. 
Lyncetjs, Muller, Latreille, Manuel, 8fc. 
Daphnides (in part), Straus. 
Daphnidiens (in part), M. Edwards. 
Daphnid^e (in part), Baird, Ann. and Mag. Nat. Hist., ii. 
Lynceid^e, Baird, Trans. Berw. Nat. Club, ii, 150, 1815. 
Character . — Two pairs of antennae ; superior, very 
short ; inferior, of moderate size, branched ; each branch 
divided into three articulations. Feet five pairs. Eye 
single, but accompanied with a black spot in front of it. 
Intestine convoluted, having one complete turn and a 
half. Abdominal portion of the body jointed. 
Bibliographical History . — Muller established the genus 
Lynceus in his ‘ Zool. Dan. Prod./ in 1776, and so named 
it, from its having, according to his idea, two eyes. 
Previous to this time no author had ever taken notice of 
any species belonging to it. In 1781 he confirmed the 
genus, in his work on the ‘ Entomostraca / described nine 
species, and gave a few particulars regarding them. 
About the same time Schrank and Eichhorn simul- 
taneously mention an insect which evidently belongs to 
this genus, and which may probably be only one and the 
