136 TEANSACTIONS LIVEKPOOL BIOLOGICAL SOCIETY. 



pair of swimming feet somewhat similar to those of 

 Stenhelia ima, Brady ; basal joints of the inner branches 

 nearly as long as the entire outer branches, second 

 joint about half the length of the third which is less than 

 one third the length of the long basal joint. Outer 

 branches of the second, third and fourth pairs elongate, 

 inner branches much shorter, those of the fourth pair 

 only reaching to the end of the second joint of the outer 

 branches. Fifth pair of feet large and well developed, 

 inner branches considerably larger than the outer ones, 

 with a subtriangular apex bearing five plumose setse, two 

 on the outer angle close together and three arranged at 

 regular intervals along the inner margins; outer branches 

 subovate, bearing six setae on the external distal margins, 

 the second seta from the inside is considerably longer 

 than any of the others. Caudal stylets about as long as 

 broad and about half the length of the last abdominal 

 segment. 



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

 neritic material dredged from a depth of 16 fathoms, 

 October 27th, 1895. 



Remarks. — This large and well marked species though 

 somewhat like Stenhelia ima in general appearance is 

 readily distinguished from it and the other known 

 members of this genus, by the form and armature of the 

 fifth pair of feet, and by the structure and proportional 

 lengths of the antennules. 



Stenhelia similis, n. sp. PL I., figs. 12 — 25. 



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

 (^g- of an inch) . Body elongate, moderately robust ; rostrum 

 prominent and curved with a bifid apex. Antennules 

 long and slender, sparingly setiferous, the second joint 

 longer than any of the others and slightly contracted near 

 the middle, but expanding again towards the distal end, 





