new Crustacea from Devon and Cornwall. 292 



Genus Laophontina, nov. 



Somewhat like Laophonte in general appearance. Ante- 

 rior antenna? short and composed of about, six joints. Outer 

 ramus of posterior antenna? uniarticulate. First pair of 

 natatory legs nearly as in Laophonte. Second and third pairs 

 one-branched and more or less rudimentary. Fourth pair 

 two-branched, outer branches three-, inner one-jointed. 

 Fifth pair as in Laophonte. Only one species is known, which 

 is described below. 



Laophontina dubia, sp. n. 



Length of female about "5 mm., male rather smaller. 

 Body somewhat slender. Antennules of the female short, 

 six-jointed ; first joint stout, longer than any of the others, 

 and with a small tooth-like process near the middle of the 

 exterior margin and another at the inner distal angle ; second 

 joint shorter than the first and armed exteriorly with a strong 

 projecting tooth; third rather longer, but less robust than 

 the second ; fourth and fifth very small ; the last joint is 

 longer than the fourth and fifth combined. 



The male antennules are modified for grasping, but the 

 first and second joints are similar to those of the female. 



Posterior antenna? moderately slender, outer ramus small 

 and uniarticulate. 



First thoracic feet as in Laophonte ; inner branches elon- 

 gated, two-jointed; first joint long and slender, the other 

 short and armed with a long stout terminal claw ; inner 

 branches very small and uniarticulate and furnished with a 

 few small seta?. Second pair rudimentary, one-branched, 

 each composed o£ a single short but moderately stout joint, 

 bearing a few small seta?. Third pair also rudimentary and 

 one-branched, but the branch is two-jointed and bears two 

 spiniform terminal seta?. Fourth pair two-branched ; outer 

 branch short, stout, and three-jointed ; the first and second 

 joints bear moderately long and stout spine-like seta? on their 

 outer margins ; the end joint is very small and bears two 

 apical seta?, one long, the other shorter and spiniform ; inner 

 branch small and uniarticulate and furnished with elongated 

 seta?. The fourth pair in the male are smaller than in the 

 female and the inner branches are nearly obsolete. 



The fifth pair in the female moderately large and foliaceous ; 

 primary joints broadly triangular and provided with about 

 four plumose seta?, one at the apex and three on the inner 

 margin ; secondary joints ovate, the length being equal to 



