6o COPEPODA AND OTHER CRUSTACEA TAKEN IN IRELAND 



slender and very short, the principal tail setae at least twice 

 as long as the abdomen. Antennules (fig. 12) of moderate 

 length, very slender, eight-jointed, and rather profusely seti- 

 ferous, the comparative lengths of the joints as in the 

 following formula 



I- 2- 3- 4- 5- 6. 7. 8. 

 ■ S 7 10 6 4 4 3 3, 

 inner branch of the antenna three-jointed, about as long 

 as the last joint of the outer branch, hand of the 

 posterior foot -jaw (fig. 13) elongated, subovate, bearing a 

 rather long seta at the proximal end of the inner 

 margin, and a long, slender, slightly curved terminal claw 

 which is slightly pectinated towards its base. The first pair 

 of feet (fig. 14) have both branches bi-articulate, inner branch 

 much the longer, the first joint quite six times as long as 

 broad, bearing a single seta near the middle of the inner 

 margin, and two much smaller ones towards the distal end of 

 the outer margin ; terminal joint very small, bearing two 

 slender claw-like setas, the inner more than twice as long as 

 the outer, the two joints of the outer branch short, stout, 

 and armed with strong marginal spines, one on the first joint, 

 two on the second, which also has three apical setas ; the rest 

 of the swimming feet have both branches three-jointed, with 

 longer and more delicate setas and less massive spines ; fifth 

 pair of feet (fig. 15) short, the first joint broad, truncated, and 

 having five marginal setae, second joint very small, ovate, with 

 five setae. Length '46 mm. Male unknown. 



Hab. — This species was taken in tidal pools at Port Erin, 

 Isle of Man, in the spring of 1893. 



Genus LAOPHONTE, Philippi. 



Laophonte subsalsa, sp. nov. (PI. II., figs. i-ii). 



Body rather stout, with short limbs, abdomen not much 

 more slender than the thorax (figs. 1,2); caudal laminae short, 

 scarcely as long as the last abdominal segment, the longest 

 tail-seta about half as long as the body. Antennules of the 



