146 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



which is very narrow, is produced on the inner margin 

 into a hook-like process furnished with a short seta, the 

 third joint has three strong spines on the outer margin 

 and apex, inner branches short, reaching to about the 

 middle of the outer branch, the second joint is furnished 

 with three short setae on its apex. Fifth pair of feet large 

 and foliaceous, inner branch triangular in shape, ciliated 

 on the inner margin and covered with a number of more 

 or less curved rows of cilia, the branch is also furnished 

 with five moderately stout plumose setae on its inner 

 margin and apex ; outer branch broadly ovate, and fully 

 half the size of the inner branch, it is also covered with 

 rows of cilia and bears five short stout plumose setae on 

 its apex. Caudal stylets elongate narrow, of moderate 

 length, about three times longer than broad and slightly 

 longer than the last abdominal segment ; bearing on the 

 inner angles of the apex, a short stout curved spine and 

 near the middle the dorsal surface, a slightly shorter spine 

 and a seta, the outer margins are furnished with two 

 short setae, the apex also bears two setae, one of which is 

 very long. Anal operculum produced into a short stout 

 spine. 



Male. Antennules six-jointed, first and second joints 

 like those of the female, third and sixth joints very small, 

 fourth joint considerably dilated. Mouth organs similar 

 to those of the female. The first and second feet are also 

 similar to to those of the female. The basal joint of the 

 outer branches of. the third pair of feet has a strong 

 curved spine on its outer distal angle which is nearly 

 twice the length of the joint itself and extends considerably 

 beyond the end of the second joint, second joint of the 

 inner branches produced into a curved spine which reaches 

 to beyond the end of the outer branch, both branches of 

 the third pair two-jointed. The fourth pair of feet has 



