176 STALK-EYED CRUSTACEA. 
The eggs, from a female 74 mm. long, Station 5405, measure 2 min. by 
1.5 mm. 
Bate’s description and figure of P. acutifrons are so imperiect that I am 
not sure that the ‘‘ Albatross” specimens belong to the same species. The 
latter differ from Bate’s figure in the following ways: the tooth at the 
anterior end of the dorsal carina of the carapace is not, at least in most 
examples, inclined upward so much; the merus of the first pair of legs is 
armed with three or four spines on the distal half of the inferior margin, 
while in Bate’s figure of P. acutifrons this joint is furnished with six spines, 
which are regularly arranged along the whole length of the inferior margin ; 
moreover, the notch in the end of the telson is shallower, and the stylocerite 
of the antennule falls considerably short of the distal extremity of the first 
segment. The second segment of the second pair of legs in the “ Albatross” 
specimens is produced to an acute tooth at the distal end of the inferior mar- 
gin, but this margin is not spinulose. The inferior margin of the fourth seg- 
ment (merus) of the same pair is armed with from eleven to fifteen spines. 
Compared with P. tarda Kriéyer, the carapace in our specimens increases 
much more in height posteriorly, the dorsal crest of the carapace is smaller 
and does not project so far forward, the notch in the distal extremity of the 
telson is much shallower, and the second segment of the second pair of legs 
is devoid of spines on the inferior margin. In P. norvegica Sars (= P. tarda, 
juv.?) the dorsal crest of the carapace is more advanced, the antennal scale 
narrower, the notch in the telson deeper, and the whole inferior margin of the 
merus of the first pair of legs is spined, as in Bate’s figure of P. acutifrons ; 
furthermore, the second segment of the second pair of legs is armed with a 
series of spines, which is not the case in P. acutifrons. In P. princeps Smith, 
only the anterior third of the carapace is carinated above, and the merus of 
the first pair of legs is devoid of spines. 
The original specimens of P. acutifrons Bate were collected off Port 
17 
Churruca, Patagonia, 245 fathoms, and south of Japan, 775 fathoms. 
Pasiphaeia magna Fax. 
Plate XLV., Fig. 2-2. 
Bull. Mus. Comp. Zodl. XXIV. 209, 1893. 
The carapace, measured along the dorsal line from the tip of the rostrum 
to the posterior margin, is a little less than two fifths of the length of the 
