32 BRITISH COPEPODA. 



Genus 9. STENHELIA, Boeck (1864). 



Anterior antenna 8- jointed; inner branch of the 

 posterior antenna of moderate size, 3-jointed, median 

 joint very small. Mandible-palp composed of a well- 

 developed basal joint and two small 1-jointed branches. 

 Masticatory segment of the maxilla provided with a 

 few strong apical claws and two smaller setiferous 

 digitate segments ; from the outer margin spring three 

 small setiferous tubercles ; first pair of foot jaws having 

 one large terminal claw and three or four digitiform 

 setose processes ; second forming a grasping hand. 

 All the branches of the swimming-feet 3-jointed, the 

 inner branch of the first pair elongated, its first joint 

 being often about as long as the whole outer branch ; 

 last two joints small, and terminating in three long 

 setae without any claw. Fifth pair foliaceous, 2-jointed. 

 abdomen in both sexes 5-jointed. 



The characters which chiefly distinguish this genus 

 from the Tachidiinte are the structure of the inner 

 branch of the first foot, the well-developed mandibular 

 and maxillar palps, and the 3-jointed inner branch of 

 the posterior antenna. From all except Robertsonia it 

 is also separated by the 2-jointed fifth foot. 



1. STENHELIA HISPIDA, nov. sp. PL XLII, figs. 1 14 

 Female. Animal rather slender ; head united with 



