LYNCEID.E. 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 Daphniae, 

 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 LYNCEIDJ5. 



LYNCEUS, Midler, Latreille, Manuel, 8fc. 

 DAPHNIDES (in part), Straus. 

 DAPHNIDIENS (in part), M. Edwards. 



(in part), Baird, Ann. and Mag. Nat. Hist., ii. 

 , Baird, Trans. Berw. Nat. Club, ii, 150, 1845. 



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. Miiller 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 



