Entomostraca from the Arctic Seas. 349 
Dactylopus tisbordes, Claus. 
This common and generally distributed species occurred in 
a sample collected on the west side of Bear Island on July 3rd, 
but, as in the case of most of the others, only a few specimens 
were observed. 
Dactylopus longirostris, Claus. 
Dactylopus longirostris was obtained in the same gathering 
with D. tenuiremis, collected to the east of Hope Island on 
July 13th. 
Dactylopus flavus, Claus. 
The gathering in which D. flavus occurred was collected 
in 60 fathoms in lat. 76° 17’ N., long. 21° 36’ E., on 
July 20th. 
Dactylopus Brucei, T. & A. Scott (sp. n.). (Pl. IV. figs. 1-6.) 
One or two specimens of this Dactylopus were obtained in 
a sample of bottom-material from 20 fathoms somewhere off 
Kostyn Point, Novaya Zemlya, or between there and Kolguev 
Island, collected on June 16th, 1898. As the species appears 
to be “new,” we submit the following description of the 
female (no male was observed) :— 
Body moderately slender; rostrum short but distinct ; 
caudal furca very short, each furcal joint is furnished with a 
stout and moderately long, lance-shaped, terminal spine, in 
addition toa few minute hairs (fig. 1) ; the length of the 
specimen figured is about ‘77 mm. (); of an inch). 
The antennules are short and eight-jointed ; the first four 
joints are moderately large and subequal, but the last four 
are smaller (fig. 2); the proportional lengths of the different 
joints are shown approximately by the formula :— 
Number of the joints...... LK 2 See a On Greae. S 
Lengths of the joints...... dias 10 12-212 OG some 7, 
The antenne and most of the mouth-appendages are some- 
what similar to the same appendages in Dactylopus Strémit 
(Baird), but the second maxillipeds are rather more slender 
and armed with long terminal claws (fig. 3). 
The first pair of swimming-feet are moderately stout (fig. 4) ; 
the proximal joint of the inner branches is robust and equal 
to rather more than one and a half times the entire length of 
the other two, which are small and subequal; a moderately 
long plumose seta springs from near the end of the inner 
margin of the first joint, while the third joint is armed at the 
