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 set®. 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 Andouini seems to be identical with Montagu’s species, 
and Bodotria arenosa of Goodsir is unquestionably the male. The form at first 
recorded by the present author as Cuma pusilla, 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). 
