144 TEANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



This species was obtained from the same material as 

 the last, and also from the mussel beds at Duddon and 

 Morecambe, it appears to be intermediate between 

 Laophonte lamellata and Laophonte hispida but is quite 

 distinct from either of them, the sub-conical form of the 

 stylets alone enable it to be easily recognised when mixed 

 up in a collection of Copepoda along with L. lamellata 

 and L. hispida. 



Pseudolaophonte, n. gen. 



Description of the genus. — Pseudolaophonte resembles 

 Laophonte, Philippi, in the structure of the antennules 

 and antennae ; the mandibles, maxillae and foot-jaws, and 

 the first pair of swimming feet, but differs from that genus 

 in the structure of the second and third pairs ; the second 

 pair of swimming feet consist of a single one-jointed 

 branch, and the outer and inner branches of the third 

 pair are each composed of two joints. The fourth and 

 fifth pairs of feet are somewhat similar to those of 

 Laophonte. 



Pseudolaophonte acitleata, n. sp. PI. III., figs. 7 — 23. 



Description of the species. — Female. Length 1 millim. 

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

 of nearly equal breadth throughout, all the segments 

 are more or less angular in shape and furnished with a 

 row of short teeth on their posterior margins ; surface of 

 all the segments clothed with minute cilia ; rostrum 

 small and inconspicuous, with a small hair on each side 

 of the base. Antennules moderately stout, four-jointed, 

 first and third joints longer than the other two, the fourth 

 joint being the smallest, the basal joint has a row of blunt 

 pointed teeth on its upper margin and three rows on its 

 lateral aspect, the middle row being the longest ; a stout 

 tubercle with a quadri-dentate apex arises from near the 

 middle of the lower margin; second joint furnished on its 



