AND AT SEATON SLUICE, KOEiaUMBEHLAND. 27 



locusta ?), one Isopod (Arcttirus lonfficornis, Sowerby), some 

 Ostracoda numerous larvae of Insects, and various Copepoda, 

 chiefly of the genus Cyclops and Canthocamptus. 



This species might, with some little modification of the generic 

 characters, have been included under the genus Cletodes : it is 

 also nearly allied to Enhydrosoma and Normanella, differing 

 from these chiefly in the build of the swimming feet. A still 

 nearer relative is perhaps Ophiocamptus, Mrazek,* but in that 

 genus the inner branches of the swimming feet are uniformly 

 two-jointed. 



Genus CANTHOCAMPTUS. 



Canthocamptus subsalsus, n. sp. (PI. II., figs. 1-13). 



Female. — Animal slender, limbs comparatively short, ovisacs 

 reaching, when the ova are mature, as far or further than the 

 base of the tail setae. The somitic angles are more or less pro- 

 fusely pectinated with spine-like cilia — the amount of armature 

 varying in different specimens. The last abdominal segment 

 contains a pair of pyriform sacs which appear to communicate 

 by ducts with the larger marginal setae of the caudal laminge. 

 Caudal laminae short, subquadrate, about as long as broad, bear- 

 ing a few short, slender, marginal setae, and at the apex three 

 setae, the central seta about as long as the abdomen of the 

 animal, the outer half as long, and the innermost not much 

 longer, than the caudal lamina itself; the two larger setae are 

 sparingly plumose. Antennules slender, the last four joints 

 nearly equal and somewhat narrower than the fixst four, spar- 

 ingly provided with setae, all of which are short. Antennae 

 having a secondary branch composed of one joint only with two 

 slender apical setae. Mandibular palp small, — one-jointed and 

 bearing four (?) setae. Penultimate joint of the posterior foot- 

 jaw armed at the apex of the inner margin with a short spine, 

 last joint ovate, its inner margin fringed with a series of deli- 

 cate, short cilia, and bearing a slender terminal unguis. Inner 

 branch of the first swimming foot three- jointed, first joint some- 



* Beitrag zur Kenntniss der Harpacticidenfauna des SiiBswassera, von Al. Mrazek, 

 Pribram i. Bbhmen. 



