1898—1902. No. 18.] CRUSTACEA. 95 
Occurrence. — One female and 2 male specimens of this pretty 
form were found in a bottle of specimens taken on July 10, 1901, at the 
mouth of Gaase Fjord from a depth of about 60 m. 
Distribution. — Franz Josef Land (Scort). 
96. Rhynchothalestris helgolandica (Cavs). 
Found occasionally in 2 of the bottles. 
97. Microthalestris forficula (Cuavs). 
This form occurred not unfrequently in 7 different bottles. 
98. Dactylopusia vulgaris, G. O. Sars. 
Not uncommon in several places. 
99. Dactylopusia glacialis, G. O. Sars, n. sp. 
(Pl. V). 
Specific Characters. — Female. Body moderately slender 
and slightly tapering behind, with the anterior division oval in form and 
not much dilated anteriorly. Cephalic segment exceeding in length the 
4 succeeding segments combined; rostral projection slightly prominent 
and obtuse at the tip. Urosome about 2/; as long as the anterior 
division, and having the segments rather sharply defined. Caudal rami 
very short, being twice as broad as they are long, and transversely 
truncated at the end; middle apical sete rather slender. Anterior an- 
tenn comparatively short, though distinctly 9-articulate, terminal part 
about the length of the 3 preceding joints combined. Posterior antenne 
and oral parts of normal structure. ist pair of legs rather strongly 
built, with both rami distinctly prehensile, the outer one nearly as long 
as the 1st joint of the inner, last joint short, spatulate in form, with 
all 4 claws well-developed and gradually increasing in length distally, 
inner ramus with the 2 outer joints, as usual, very short and abruptly 
incurved, the last one armed with 2 very strong claws of unequal 
length, seta of ist joint attached about in the middle. Natatory legs 
of the usual structure. Last pair of legs comparatively large and pro- 
nouncedly foliaceous, distal joint very broad, rounded in shape, and 
scarcely exserted at the tip; inner expansion of proximal joint almost 
extending as far as the distal joint, 2 of the sete on each joint very 
slender and elongated. 
Male, as usual, smaller than female, and having the anterior an- 
tenne distinctly hinged. Inner ramus of 2nd pair of legs with the 
