.'330 BRITISH ENTOMOSTRACA. 



Head small, and situated at the end of a long and slender 

 neck. It is rounded at the anterior extremity, and a 

 little below the antennae exhibits on each side a round 

 lobe or tubercle. The antennae and foot- jaws are very 

 small. The neck nearly equals in length the rest of the 

 body. The thorax is broad, and of a somewhat quadran- 

 gular shape, with a deep indentation on each side about 

 the middle of its length. On the upper half we see two 

 pairs of prolongations or appendages, each divided into 

 three digitations ; and on the lower half there are three 

 smaller appendages, but simple, not digitated. The pos- 

 terior angles of the thorax are prolonged also into short 

 horns or appendages, which are also simple. The abdo- 

 men is in form of a short tubercle, with a rounded blunt 

 point. The oviferous sacs are of about the length of the 

 whole animal, of considerable size, and cylindrical. 



The male is similar, according to M. Edwards, to that 

 of Chondracantfms (Lernentoma) cornutus. 



Hab. It is found attached to the branchiae of the 

 Triylce. Falmouth, J. Crouch, Esq. British Museum. 



3. LERNENTOMA LOPHII. Tab. XXXV, fig. 3. 



CHONDKACANTHUS LOPHII, Johnston, Loudou's Mag. Nat. Hist., ix, 



81, 82, f. 16-c, 1836. 

 Rathke* Nov. Act. Nat. Cur., xx, 116, t. 5, 



f. 11-18, 1813. 



CIIONDRACANTHUS GiBBOSus, Kroyer, Tidsskrift, i, 252, t. 2, f. 4. 

 CHONDRACANTHUS DELAROCHIANA (pars), M. Edwards, Hist. Nat. 



Crust., iii. 



Character. Female. Body rather elongate, and some- 

 what gibbous. Head small, having on each side a small 

 horn-shaped appendage directed a little obliquely back- 

 wards. Antennae small, conical, and slightly curved. 

 Thorax divided into four portions by as many contractions. 



' Rathke has described the same species under the same name as Dr. 

 Johnston has applied to it, but evidently without knowing that the name 

 had already been vised. 



