MR. G. S. BRADY OH THE PELAGIC ENTOMOSTRACA. 31 



rounded. Carapace in adult female having a large round ovi- 

 ferous sac over the thorax. Abdomen small, having a little pro- 

 cess ahove bearing two very short pellucid seta?, and terminating 

 in two stiliform nails bending backwards. First antenna rudi- 

 mentary and alike in both sexes. Second antenna having one 

 branch 3, the other 4-jointed, all the joints — except the very 

 small basal joint of the 4-jointed branch — bearing ciliated but not 

 jointed setae. Lip short and thick, forming a rounded lobe which 

 has its inferior margin sparingly furnished with short spine-like 

 setae. Mandibles moderately large, upper part indistinctly defined, 

 lower strongly bent inwards, forming with the upper part a 

 nearly right angle, attenuated towards the extremity, and ending 

 in two teeth. No maxilla. Feet four pairs, all prehensile, and 

 scarcely branchial, basal joint furnished with a small setiferous 

 appendage ; first pair longer than the others and more slender, 

 4-jointed; two last joints small, and bearing long curved seta? ; 

 these joints in the male are a little dilated ; last joint armed with 

 a small curved nail; second and third pair alike, 4-jointed; basal 

 joint having an appendage on the inner side furnished with ter- 

 minal spines, and may be compared to the coxal or maxillary 

 (coxali vel maxillari) process in other Claclocera ; the seta? of the 

 other joints shorter and more nail-like than in the legs of first 

 pair. Last legs much shorter than the others, and not distinctly 

 articulated. Eye very large, entirely filling the fore part of the 

 head, having very numerous and very long crystalline lenses. 

 On the hinder portion of the back of the head there is a distinct 

 organ of attachment. Intestine simple and nearly straight, and 

 terminates before the caudal stiliform appendages. 



1. Pleopis polyphemoides, Leuckart. PL IY, fig. 14. 



Fvadne polyphemoides, Leuckart, "Weigmann's Archiv. 1859, 

 p. 262, and Ann. & Mag. ISTat. Hist., 3rd Series, vol. V, 

 p. 445. 



This species occurs mostly at some little distance from land, 

 associated often with Fvadne JYordmanni, from which it is readily 

 distinguished by the form of the carapace which is rounded beloAV 

 and deeply constricted at the neck. The front of the head is 



