1898-1902. No. 18.] CRUSTACEA. 25 



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 (Scorr). 



96. Rhynchothalestris helgolandica, (GLAUS). 

 Found occasionally in 2 of the bottles. 



97. Microthalestris forficula (GLAUS). 



This form occurred not unfrequently ' in 7 different bottles. 



98. Dactylopusia vulgaris, G. 0. SARS. 

 Not uncommon in several places. 



99. Dactylopusia glacialis, G. 0. SARS, n. sp. 

 (PI. 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 / 3 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 setae rather slender. Anterior an- 

 tennae comparatively short, though distinctly 9-articulate, terminal part 

 about the length of the 3 preceding joints combined. Posterior antennae 

 and oral parts of normal structure. 1st 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 1st 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 setae on each joint very 

 slender and elongated. 



Male, as usual, smaller than female, and having the anterior an- 

 tennae distinctly hinged. Inner ramus of 2nd pair of legs with the 



