72 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



the outer branch three-jointed and the inner two; the 

 basal joint of the outer branches is longer than the 

 combined lengths of the second and third joints and bears 

 a strong spine on its outer distal angle, second and 

 third joints of the outer branch of about equal length ; 

 inner branches very short reaching to about the middle 

 of the basal joint of the outer branch, basal joint of the 

 inner branch very small and only about one-fourth the 

 length of the second joint. Fifth pair small, inner branch 

 not produced, furnished with two plumose setae on its 

 apex, the inner one being three times longer than the 

 outer ; outer branch elongate narrow, bearing at its apex 

 three stout setoe. 



Habitat, 1 mile off Spanish Head, Isle of Man, in 

 neritic material dredged from a depth of 16 fathoms ; a 

 number of specimens were obtained. 



Bemarks. — This species comes very near Laophontc 

 spinosa, I. C. Thompson, especially in the structure of 

 the antennules and mouth organs, but differs considerably 

 in the structure of the second, third and fourth pairs of 

 swimming feet ; the outer branches of the second, third 

 and fourth feet in haoplionte spinosa are two jointed and 

 the inner three, whilst in PseudoJaoplionte aculeata the 

 second pair of feet consists of a single one-jointed branch, 

 in the third pair each branch is composed of two joints 

 and in the fourth pair the outer branch consists of three 

 joints and the inner of two, the fifth feet also differ 

 soi no what. The appendages of the male differ also from 

 those of the male Laoplionte spinos<i. 



Laophontodes bicornis, n. sp. PI. III., figs. 24 — 25 ; 

 IV., figs. 1—7. 



Description of the species. — Female. Length '5 millim. 

 (.,\th of an inch). Body seen from above elongate narrow, 

 the breadth gradually decreasing towards the posterior 



