54 BRITISH ENTOMOSTRACA. 



Cancer stagnalis {Linn. ?), Shaw, Linn. Trans., i, 103, t. 9, f. 4, 5. 

 Cancek paludosus (?), Midler, Zool. Dan., t. 48, f. 1-8. 



— Berbst, Krabben, ii, 118, t. 35, f. 3-5. 



Branchipus stagnalis, M. Edtcards, Cuv. Regne Anim., edit. 



Crochart, Crust., t. 74, f. 2. 

 Ino piscina, Schrank, Faun. Boic, iii, 249, 1803. 

 Marteau d'eau douce, Duchesne, Manuel du Naturaliste. 

 Remarkable aquatic insect. King, Phil. Trans., Ivii, 72, t. 4, 1762. 

 Squilla lacustris minima, Petiver, Gazoph. Nat., i, t. 21, f. 7, 1709. 



Deso'ijjfion. — When full grown it is upwards of an 

 inch in length, slender, of a cylindrical form, and nearly 

 perfectly transparent. The male is more so than the 

 female, but with a slight reddish tinge throughout. The 

 tail is of a bright red ; the large basal joint of the 

 prehensile antennae of a beautiful transparent bluish- 

 green colour, tipped at the extremity, where the second 

 joint arises with a fine red hue. The back of the female 

 is of a blue colour, and the ovary, when full of ova, of a 

 reddish-brown. 



Hab. — Pools on Blackheath, W. B. ; near Epping, 

 E. Doubleday, Esq. ; near Brighton, C. Ager ; near Bristol 

 and in Devonshire, Dr. Leach, Brit. Mus.; near Hammer- 

 smith, J. O. Westwood, Esq. 



2 — Artemia. 



Cancer, Linnaeus, Racketi. 

 Gammarus, Fabricius, Pennant, Herbst. 

 Autemia, Leach, Desmarest, 31. Edwards, Joly. 

 Branchipus, Latreille. 

 Artemisus, Lamarck. 

 Artemis, Thompson. 



Character. — Abdomen long, consisting of six divisions, 

 shortly bilobed, and not divided into two caudal plates ; 

 cephalic horns of male flat, broad, and not furnished mth 

 any appendages. 



