27!) 



as the anterior division, and having the lateral parts of the segments slightly 

 projecting; last segment about the length of the preceding one, anal opercle some- 

 what prominent and finely denticulate. Caudal rami comparatively short, not 

 attaining the length of the anal segment, being about twice as long as they are 

 broad; middle apical seta normal and distinctly jointed at the base. Anterior 

 antennae scarcely half as long as the cephalic segment, and clothed with partly 

 ciliated seise, 3rd joint the largest, terminal part about the length of this joint. 

 Posterior antenna? with the outer ramus rather small, scarcely half as long as the 

 basal joint. 1st pair of legs with the outer ramus about half as long as the inner, 

 its last joint longer than the middle one, and armed with 3 spines and 2 geniculate 

 setar, inner ramus very slender, with the distal joint about J /4 the length of the 

 proximal one. Natatory legs of moderate size, with the outer ramus rather nar- 

 row, inner ramus of 2nd pair extending almost to the middle of the terminal joint 

 of the outer, that of 4th pair much shorter. Last pair of legs with the distal 

 joint very narrow, sub-linear in form and densely ciliated on both edges, marginal 

 setae 6 in number, some of them rather slender and elongated; inner expansion 

 of proximal joint extending considerably beyond the middle of the distal joint, 

 and carrying 5 setae, 3 of them very long and issuing from the tip. Ovisac of 

 moderate size and oval in form. 



Male with the anterior antennae very strong, sub-clavate in form, 4th joint 

 globularly dilated, terminal part claw-like, incurved. Last pair of legs much smaller 

 than in female, distal joint rather small and provided with only 4 setae; inner 

 expansion of proximal joint tipped with 2 subequal setae. 



Colour light reddish yellow. 



Length of adult female 0.55 mm. 



Remarks. This form was very imperfectly characterised by Boeck and 

 erroneously referred by him to the genus Mesochra, apparently owing to a certain 

 similarity in the structure of the inner rami of the natatory legs. Prof. Brady 

 did not recognise the Boeckian species, and described it as the type of a new 

 genus under the name of Normanella duljia, placing it next to the genus Laoplioutr. 



Occurrence. I have met with this form occasionally in several places both 

 on the south and west coasts of Norway, as also in the Trondhjem Fjord, in 

 moderate depths among algffi. Boeck records it also from the Christiania Fjord. 



Distribution. British Isles (Brady). 



