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PACIFIC SCIENCE, Vol. XX, October 1966 
exopods as in female (Figs. 2 A-D ; Table 1). 
Endopods of legs 2-4 more or less modified, 
all except that of leg 2 similar in length and 
setation to female (Table 1). That of leg 2 
(Figs. 2 K-L) of general form found in genus; 
segment 1 with inner spurlike process and lack- 
ing seta; outer margin of segment 2 produced 
distally as long process reaching beyond apex 
of exopod by nearly half the length of entire 
segment. Segment 3 reduced, about one-third 
length of segment 2, inserted deeply into inner 
part of proximal third of segment 2; inner 
apex produced as stout process nearly one-third 
total length of its segment, armed with raised 
surface spinules; inner margin with 4 slender 
setae, the proximal two reaching beyond apex 
of segmental process, each set sparsely with fine 
hairs and having a long spinule at its base ; the 
distal two set closely together in recess at base 
of segmental process, reaching to its apex or a 
little beyond (Fig. 2 L). (Willey has shown 
only 1 distal seta in his figure, which is un- 
doubtedly incorrect since the setae are closely 
set and difficult to distinguish from one another, 
and illustrations of other species of the genus 
show 2 distal setae.) Modification of leg 3 
largely affecting segment 2 (Figs. 2 /-/), which 
is enlarged both inwardly and outwardly; apex 
of outer enlargement produced distally, blunt, 
of thickened cuticle into which inner tissue does 
Fig. 3. Danielssenia stefanssoni, Male: Antennule 
(same scale as Fig. 1 G). 
not penetrate (Fig. 21) (neither stained nor 
unstained material studied in different views at 
various magnifications with both dry and oil im- 
mersion objectives showed any incision such as 
illustrated by Willey; where this exists it is 
probably an insignificant, individual variation) ; 
inner part of segment enlarged, with distal lobe 
and stout, short seta (Fig. 21) ; segment 3 con- 
stricted basally, bearing 6 spines and setae as in 
female. Leg 4 endopod (Figs. 2 G-H) very 
similar to that of female; segments 1 and 2 with 
slightly more acuminate margins. 
Leg 5 (Fig. 2 F). With 5 setae on exopod, 
variable in length from one specimen to another 
but seta 3 (from outer margin) always the long- 
est; basal part hardly produced, with 2 (or 
sometimes 3) setae, seta 2 the longer. Leg 6 
with 3 setae, the outer the longest. 
distribution and ecology: The type local- 
ity was not designated and must be considered 
to be generalized in the Bernard Harbour re- 
gion of Dolphin and Union Strait. Bernard 
Harbour (about 69°09 / N, 114°40'W) is on 
the mainland of Canada near the eastern end 
of the strait which separates the mainland from 
Victoria Island, one of the island group mark- 
ing the eastern limits of the Beaufort Sea. The 
number of specimens and sex are listed for some 
of Willey’s records, but none include both sexes. 
The specimens occurred in plankton tows, 
mostly surface, with copepods of the three 
major free-living orders. References to depth 
of water at stations are not always given or are 
indefinite; greatest depth of water recorded is 
3 fms (5.5 m). Salinity is not given. Collec- 
tions were presumably made in ice-free water 
between August 9 and September 30, 1915. 
Greenland records are from the eastern coast 
of the Denmark Strait separating Greenland 
from Iceland. Collections were made July 14- 
September 8, 1932, at Barclay Bugt, 69°15'N, 
24°50 / W (Jespersen, 1939^), and at Kanger- 
dlugssuaq, about 68°18'N, 32°20 / W (Jesper- 
sen, 1939 b). The reference of Mohr et al. 
(1961) is to Nuwuk Lake, Point Barrow, 
Alaska, and that of Wilson and Tash (1966) 
to the Cape Thompson region of the Alaskan 
Chukchi Sea coast, for both of which detailed 
records are given above under the section, 
"Occurrence of Alaskan Specimens.” All 
