150 DR BAJRD ON ENTOMOSTRACA. 



shell. Second pair of antennae large, two-branched, one branch 

 having four, the other three articulations. 



Sp. 1st. — Evadne Nordmanni, Loven^ Edwards ^ Goodsir, 

 Edin. Phil. Jour, xxxiii., t. 6, f. 15-16. 



This species has been taken in the Firth of Forth, by Mr Good- 

 sir. We may reasonably expect it to exist also along the coast of 

 Berwickshire. 



FAMILY 4.-.LYNCEIDJE— JBatVcf.* 



Two pairs of antennae, superior very short, inferior of moderate 

 size, two-branched, each branch having three articulations. Feet 

 five pairs. Head prolonged into a more or less sharp beak. Eye 

 single, but accompanied with a black spot, situate in front of it. 

 Intestine convoluted, having one complete turn and a half. Ab- 

 dominal portion of body jointed. , 



Genw 1st. — EuRTCERCUS — Baird. 



Subquadrangular. Abdomen very broad, in form of a flat plate, 

 densely serrated. 



Sp. 1st. — E. lamellatus. — ^Lynceus lamellatus, Muller. Monoc. 

 lamellatus, Linn. Eurycercus lamellatus, Baird. Ann. Mag. Nat. 

 Hist. 



Hab. In Yetholm Loch : pool on Beaumont water, near Yet- 

 holm, &c. 



Genus 2d. — Chydorus — Leach. Enc. Brit. Suppl. 



Nearly spherical in shape. Beak very long and sharp, curved 

 almost into the shape of a crescent. Inferior antennae very short. 



Sp. 1st. — C. sphsericus — Lynceus sphsericus, Mull. Chydorus 

 Mulleri, Leach. C. sphaericus, Baird. Ann. Mag. Nat. Hist. 

 Hab. Very common throughout the county. 



Sp. 2d. — C. globosus, Baird. Ann. Mag. Nat. Hist. 



Oenus 3d, — Camptocercus — Baird. 



Ovoid-shaped. Abdomen long, slender, and extremely flexible ; 

 serrated. 



Sp. Ist. — C. macrourus, Baird. Ann. Mag. Nat. Hist. Lyn- 

 ceus macruorus, Muller. Entomost. 



* Ann. Mag. Nat. Hist. 



