70 
length. Appendages transformed in a similar manner to that in the male of 
L. lonyimana. 
Remarks .—This form is nearly allied to the type species, though easily 
distinguishable in both sexes, being especially recognizable by the extremely slender 
and narrow tail, and by the coarsely serrated lateral keels of the carapace in 
the male. 
Occurrence .—I first found this form off the Lofoten Islands, and have 
subsequently met with it also in several other places on the Norwegian coast, 
for instance, in the outer part of the Hardanger Fjord, at Aalesund, in the Trond- 
hjem Fjord, and at Vadso. It is generally found in depths ranging from 50 to 
150 fathoms, muddy clay. 
Distribution. —Stat. 33 of the Norwegian North Atlantic Expedition (the 
present author). 
16. Leptostylis ampullaeea (Lilljeborg). 
(PL L, fig. 1). 
Duma ampullaeea, Lilljeborg, 0fvvrs. Vet. Akad. Forh. 1855, p. 120. 
Syn: Diastylis ampullaeea, G. 0. Sars. 
Specific Characters. — Female. Body comparatively short and clumsy, with 
the anterior division much tumefied and considerably vaulted above. Carapace 
large and somewhat sloping in front, surface smooth and clothed with scattered 
slender hairs, pseudorostral projection comparatively short and bluntly triangular 
in form, subrostral corners rounded off, inferior edges coarsely serrate in their 
anterior halves. The first 2 pedigerous segments each having the anterior edge 
emarginated in the middle, and forming on each side of the emargination a slight 
appressed lappet. Tail (exclusive of the terminal appendages) scarcely longer 
than the anterior division, and comparatively less slender than in the 2 preceding 
species. Superior antenna with the 1st joint of the peduncle almost as long as the 
other 2 combined. First pair of legs not much elongated, scarcely exceeding in 
length the carapace, basal joint about the length of the last 3 joints combined, 
penultimate joint somewhat longer than the antepenultimate one, last joint com¬ 
paratively short; 2nd pair with the terminal joint nearly as long as the ante¬ 
penultimate one; the 3 posterior pairs less slender than in the 2 preceding species. 
Uropoda comparatively short, inner ramus almost as long as the stem, and exceeding 
the outer by about V* of its length, 1st joint about the length of the other 2 
combined, spinules of the inner edge 5 in number (3 on the 1st, and 1 on each 
of the last 2 joints), apical spine slender, setiform. Telson about half the length 
