11 



upper margin straight, lower strongly arcuate, pseudo-rostral projection short but 

 distinct. 1st pedigerous segment only visible in its epimeral parts; 2nd segment 

 rather large, but scarcely elevated above the level of the carapace, and exhibit- 

 ing on each side a well marked carina meeting that of the carapace; the last 2 

 segments much smaller than the preceding ones, and rather widely separated. 

 Eye in both sexes with 8 distinct corneal lenses. 1st pair of legs scarcely longer 

 than the carapace, basal joint rather broad in its proximal part, and much longer 

 than the succeeding joints combined; 2nd pair moderately curved, with 3 apical 

 spines on the terminal joint. Uropoda exceeding in length the last 2 segments 

 combined, rami scarcely half the length of the basal part, the inner one uniarti- 

 culate, with the inner edge serrate and carrying 3 ciliated spinules, tip narrowly 

 truncate and armed with 2 unequal spinules. Adult male much more slender 

 than female, with the carapace comparatively larger, and the pedigerous segments 

 less tumid ; caudal segments with distinct epimeral plates ; uropoda clothed inside 

 the basal part with ciliated setse. Colour yellowish brown, with a whitish trans- 

 versal band across the carapace in front of the middle. Length of female rea- 

 ching to 7 mm., that of male about the same. 



Remarks. This is probably the form at first recorded by Montagu as 

 Cancer scorpioides, though his description and figure would equally well apply to 

 the succeeding, very nearly allied species. The form subsequently described by 

 Milne-Edwards as Cuma Andoumi seems to be identical with Montagu's species, 

 and Bodotria arcnosa of Goodsir is unquestionably the male. The form at first 

 recorded by the present author as Cuma vusilla, I now consider to be only 

 a young specimen of this species. It is quite distinct from the 3 other 

 known species, from the fact that the inner ramus of the uropoda is uniarticu- 

 late, instead of biarticulate. 



Occurrence. I have met with this form in several places, both on the 

 south and west coasts of Norway, up to Appelvser in Namdal. It generally oc- 

 curs at a few fathoms' depth on a sandy bottom, in which it is able to bury 

 itself with great dexterity, so as wholly to escape attention. As usual, the adult 

 males (Bodotria) are much more agile than the females, swimming about with 

 great rapidity, especially with the aid of the well-developed pleopoda. In spite of 

 the indurated integuments, the flexibility of the body in both sexes is very great, 

 the tail admitting of being twisted in various directions. 



Distribution. British Isles (Montagu), coast of France (M.-Edwards), 

 Kattegat (Meinert). 



