140 BRITISH COPEPODA. 



Moreover, it is doubtful whether some other species 

 here referred to Thalestris (notably T. rufocincta) 

 might not also, considering their general conformation, 

 have to accompany T. peltata in any generic migra- 

 tion. On these grounds I think it better, for the 

 present, to ignore the genus Amenophia. I have not, 

 in my single specimen, been able to observe accurately 

 the position of the eyes, and have therefore, in this 

 respect, as well as in that of colour, simply recorded 

 the statements of M. Boeck. 



Genus 26. WESTWOODIA, Dana, 1855. 



(Harpacticus, in part, Baird.) 



Cephalothorax large and robust ; abdomen slender. 

 Head and first thoracic ring coalescent; rostrum of 

 moderate size ; first pair of antennae 6-jointed, second 

 pair 2-jointed, with a 2-jointed inner branch. Man- 

 dibles elongated, slender ; palp consisting of a long, 

 narrow, basal joint, with two small, 1-jointed branches. 

 First foot- jaw stout, provided with a strong terminal 

 claw and three marginal, setiferous digits. Second 

 foot-jaw forming a stout, grasping hand. Inner 

 branch of the first foot 1-jointed, outer branch 3- 

 jointed ; the first joint much elongated, second and 

 third joints rudimentary and terminating in two claws. 

 Both branches of second, third, and fourth pairs of 

 swimming-feet 3- jointed ; fifth pair foliaceous, two 

 branched. 



