652 



lamellar. Colour in the living state of the animal not yet stated. Length 



of adult female 14 mm. 



Remarks. The above given description and the accompanying figures 

 are from 2 specimens in the collection of Boeck labelled as above. The 

 description and figures given by Boeck in his great work would seem to differ 

 in some points; his statement about the length of the animal (3540 mm.) 

 is especially strange, and seems to indicate, that he has confounded 

 the Norwegian form with the nearly-allied Arctic species, JE. spinosissima 

 Stimpson, of which he may have had specimens for examination. Of the 

 latter species several specimens were collected during the Norwegian North 

 Atlantic Expedition, and a description of this form, accompanied by some 

 figures, has been given by the author in the account of the Crustacea of 

 that Expedition, the species being named JE. spinifera Bell. It will appear, 

 on a closer comparison, that the Norwegian form described above, is speci- 

 fically distinct from the Arctic species, though nearly related, as to the 

 structure of the several appendages. 



Occurrence. - I have not myself met witli this form, but Boeck states 

 its occurrence off the west coast of Norway, in the neighbourhood of Bergen. 

 Out of Norway, it has not yet been recorded. 



Gen. 4. JEginella, Boeck, 1860. 



Body somewhat robust and coarsely spinous, with the cephalosome 

 comparatively short and exhibiting a well-marked suture between the cephalon 

 and the 1st segment of mesosome; the last 2 body-segments comparatively 

 short. Antennae and oral parts about of same structure as in the genus 

 JEgina. Anterior gnathopoda small; posterior ones very powerfully developed, 

 with the propodos large and broad, slightly differing in the 2 sexes. The 2 

 anterior pairs of pereiopoda quite wanting; the 3 posterior pairs subequal 

 and rather strong, distinctly subcheliform. Branchial lamellae only present 

 on the 3rd and 4th segments of mesosome. Urosome small, composed of 2 

 segments, the anterior of which carries a pair of uniarticulate appendages 

 (uropoda). 



Remarlcs. This genus, established by Boeck, is nearly allied to the 



! preceding ones, yet differs in the more distinct demarcation between the 



cephalon and the 1st segment of mesosome, the somewhat differently shaped 



posterior gnathopoda, and the structure of the urosome, which agrees with 



