228 
BRITISH ENTOMOSTRACA. 
1. Temora Tinmarchica. Tab. XXVIII, figs. 1, 1 a-g . 
Monocultjs Einmarchicus, Gunner , Act. Hafn., x, 175, f. 20-23, 17 65. 
Cyclops Finmarchicus, Muller, Zool. Dan. Prod., No. 2415. 
Cyclops longicornis, Muller, Entomost., 115, t. 19, f. 7-9. 
— Lamarck, An. s. Yert., v, 189. 
— Latreille, Hist. Nat. Crust., iii, 266 ; Gen. 
Crust, et Insect., ii, 26. 
— Bose, Man. d’Hist. Nat. Crust., ii, 259. 
— Leach, Edinb. Enc., art. Crustaceology. 
Monoculus longicornis, Fabricius, Ent. Syst., ii, 501, No. 52. 
— Gmelin, Linn. Syst. Nat., 2997, No. 15. 
— Manuel, Enc. meth., 720, t. 264, f. 11-14. 
Calanus Einmarchianus, Leach, Diet. Sc. Nat., xiv, art. Entomost. 
— Desmarest, Cons. gen. Crust., 364. 
— • Krusensterri? s Yoyage, Atlas, t. 22, f. 14. 
Description . — The body is of a dark brown colour 
(preserved in spirits). 
Thorax consists of five segments ; the first, with which 
the head is consolidated, is the largest, the other four 
gradually becoming smaller as they descend. 
The abdomen has only three segments, and has a long, 
bifid, caudal joint, terminated by two short, stout sefse, 
serrated on the edges. 
The antennae or rami (t. XXVIII, f. 1 /) are very long, 
exceeding the body in length, though not quite equal to 
the body and abdomen together, and are composed of 
twenty-four short articulations. 
The antennules (f. 1 b) are two-branched. The 
first branch consists of two joints, the latter of which 
is deeply notched at the extremity, and is terminated by 
seven or eight long hairs. The second branch has six 
articulations, the first and last of which are of equal length, 
and the four intervening ones are very short. The first 
joint gives off from its inner edge four long setae, each of 
the short ones gives off one, and the last is terminated by 
two or three of still greater length. 
The mandible and its palpiform branch (f. 1 a) are 
