COPEPODA. 263 



form and in its mouth organs, posterior antenna?, and 2nd, 3rd, and 4th pairs of 



natatory legs. Anterior antennae 8-jointed, the proportional length of the joints 



1. 2. 3. 4. 5. 6. 7. 8. 



being as follows : — 



s 10. 12. 6. 10. 2. 3. 4. 6. 



In its 1st pair of natatory legs it resembles S. longicornis, the 5th pair being 

 similar to those of S. gracilicaudata. 



One specimen only, a female, was found in the Muttuvaratu pearl oyster washings. 



Its minute size, the jointing of the anterior antenna?, and the 1st and 5th natatory 

 legs constituted its chief features. 



Paras tenhelia, n. gen. 



Anterior antenna? 9-jointed. Inner branch of posterior antenna? 3 -jointed. 



Mandible palp with 2 branches each 1 -jointed. Second maxilliped like a grasping 

 hand. First pair of natatory legs has outer branch 3-jointed, inner branch 2-jointed. 

 Inner branches of 2nd, 3rd, and 4th pairs all 3-jointed. Fifth pair foliaceous and 

 2-jointed. Abdomen in both sexes 5-jointed. 



The characters which distinguish this genus from Stenhelia are the 9-jointed 

 antenna? and the 2-jointed inner branch in 1st pair of natatory legs. 



Parastenhelia hornelli, n. sp. — Plate VII., figs. 1 to 10. 



Length, female 1 millim. ; male 077 millim. 



In general appearance, and in the jointing of cephalothorax and abdomen, this 

 species much resembles the members of the genus Stenhelia. 



Anterior antenna? of female 9-jointed, the proportional lengths of the joints being 



as follows 



21. 20. 15. 12. 8. 11. 4. 3. 12. 



The upper surface is plentifully clothed with long seta?. Inner branch of posterior 

 antenna? 3-jointed, the 2 apical joints bearing several plumose spines. 



Basal joint of mandible large, with lateral warty protuberance, and 3 rounded teeth 

 at apex. Palp is of pyriform shape, having 3 plumose spines at apex, and laterally 

 has 2 branches, each composed of 1 joint bearing several seta?. Second maxilliped is 

 a grasping hand with ovate middle joint, terminating in a stout claw. 



Inner branch of 1st pair of natatory legs 2-jointed, the 1st joint being lj times the 

 length of the entire 3-jointed outer branch ; terminal joint very small. 



Inner branches of 2nd, 3rd, and 4th pairs all 3-jointed in both sexes. Fifth pair 

 foliaceous ; basal joint triangular and bearing plumose spines. Second joint in female 

 very long, wide at base and tapering towards apex, the edges having fine hairs, and 

 the apex G spines, mostly plumose. Outer branch of male 5th pair half the size of 

 the female and distinctly divided into 3 joints bearing spines, mostly plumose. 



Several males and females were found in the washings from young pearl oysters, 

 also in the general washings of dredged material, in deep water off Point de Galle, 



