Mysidacea and Euphausiacea — BANNER 
and clay. Further details on the stations may 
be found in Wilimovsky (1953). 
DISCUSSION: Specimens apparently of this 
species are represented in the collection only 
by mature females and immature specimens 
of both sexes. The immature males are about 
10 millimeters long, whereas the two mature 
females are over 20 millimeters long. The 
specimens agree well with the described char- 
acteristics of M. oculata, except that the pleo- 
pods of the males are obviously immature. 
In these males all pleopods save the fourth 
are uniramous, and in the fourth the exopod 
is divided into only three articles, whereas the 
endopod has no subdivisions. However, in 
adult M. oculata both the third and fourth 
pleopods are biramous, the third with an ex- 
opod of five articles and the fourth with an 
exopod of seven articles. Because of the close 
similarity of these specimens to the descrip- 
tions of M. oculata, and because of the much 
greater size of the mature females, it was de- 
cided that the males were immature. 
This condition is the same as that of the 
immature males described by me as Pugeto- 
mysis litoralis. I had presumed from the fourth 
pleopods of these specimens that they were 
almost mature. Since examining the Point 
Barrow specimens, I have re-examined the 
specimens in the type lot, and I can find no 
differences that could be considered of major 
importance. Therefore, P. litoralis is a syn- 
onym of M. oculata, and the genus Pugeto- 
mysis, erected to contain only that species, is 
a synonym. As a consequence, the type will 
not be deposited in the U. S. National 
Museum. 
Mysis oculata is circumpolar in distribution 
and has been reported from the arctic coasts 
of North America, Europe, and Asia; it has 
been reported from the Arctic Ocean on 
either side of Bering Straits and as far south 
as Kiska, Alaska. 
The specirnens originally reported as P. 
litoralis came from Friday Harbor, Washing- 
ton, and represent the first record of the spe- 
cies in the Pacific Ocean proper and the first 
127 
record of the genus or species along the 
western coast of subtemperate and temperate 
North America. 
Mysis relicta Loven 
Mysis relicta Loven, Svenska Vetensk. Akad., 
Ofversigt af . . . forhandl., p. 285, 1862. 
Tattersall, U. S. Natl. Mus., 
Bui. 201: 167-168, hg. 62, 1951. 
SPECIMENS EXAMINED: Arctic Research Lab- 
oratory: No. 489, beach, Point Barrow, Alaska, 
Sept. 24, 1950; Wiggins, collector. Two spec- 
imens, immature. 
No. 665, plankton cow off Point Barrow, 
Alaska, Sept. 30, 1949; MacGinitie, collector. 
About 500 specimens, immature. 
No..^, Elson Lagoon near Point Barrow, 
Alaska, Sept. 1, 1949; MacGinitie, collector. 
About 50 specimens, immature. 
No..^, Elson Lagoon near Point Barrow, 
Alaska, July 28, 1950; MacGinitie, collector. 
Five specimens, immature. 
No..^, Nuwuk Pond near Point Barrow, 
Alaska, Aug., 1952 (chlorinity 1.3 o/oo); 
John Mohr, collector. Twelve specimens, 
immature. 
DISCUSSION: Mysis relicta is distinguished 
from the very closely related M. oculata chiefly 
by a more shallow and more pointed indenta- 
tion on the posterior margin of the telson and 
a broader squame of the second antenna. 
However, these conditions are found in the 
larval form of AI. oculata as well. In view of 
the work of Olafsson (1918) which indicated 
that M. relicta might not be produced by any 
inherited differences from the stem form but 
merely by the lesser salinity of their environ- 
ment, I am not personally convinced of the 
validity of the species. However, until more 
definite information is available I will accept 
the decision of previous workers that M. 
relicta is a separate and valid species. 
The celsons of the specimens listed are al- 
most identical to those described for M. relic- 
ta, but the antennal squame is more like that 
of M. oculata, almost six times as long as 
