PASIPHAEIA ACUTIFRONS. 1) 
in proportion to the whole body than it is in the latter, and that the dorsal 
crest is smaller and somewhat differently shaped. Comparison of the figures 
of the two species reveals, moreover, a difference in the outline of the antero- 
lateral margin of the carapace. The fifth and sixth abdominal segments are 
much shorter in proportion to the length of the telson in P. americana than 
in P. cristata. The antennular peduncle in the former is only one third 
as long as the carapace, while in the latter it is about one half as long. 
Finally, the flagellum of the antenna in the former is longer than the body, 
while in the latter it is described as being only one half as long. 
Eggs, taken from beneath the abdomen of a female specimen, measure 
2mm. by 1.5 mm. 
Pasiphaeia princeps Smiru. 
Pasiphae princeps Situ, Aun. Rep. U. 8. Fish Comm. for 1882, p. 381, Plate V. Fig. 2, 1884. 
Station 3576. 1152 fathoms. 1 specimen. 
The distal end of the basipodite of the first and second pairs of legs is 
armed with a spine below. The merus of the first pair of legs is destitute of 
spines, while the merus of the second pair is armed with six spines on the 
inferior border. Length from tip of postfrontal spine to end of telson, 
70 mm. 
The type specimen of Pasiphaeia princeps was obtained by the “ Alba- 
tross” off the east coast of the United States in 1885, lat. 59° 29’ N., long. 
70° 58’ 40” W., 1342 fathoms. It is a very large specimen, measuring 
215 mm. in length. Smaller specimens were secured in the same region 
during the cruise of the “ Albatross ” in 1884, from depths varying from 444 
fathoms to 693 fathoms.* 
The late J. Wood-Mason f established a new genus, Phye, for Pasiphaeia 
aleockt, P. princeps, P. acutifrons, etc., in which the carapace and abdomen are 
more or less carinated dorsally, the telson forked, and branchiostegal spines 
present. 
Pasiphaeia acutifrons Bare. ? 
? Pasiphea acutifrons Bats, Rep. Challenger Macrura, p. 871, Plate CXLI. Fig. 3, 1888. 
Station 3402. 421 fathoms. 2 specimens. 
oe 8408. 384 <« 4 oe 
cs 34065) ool <6 4 é 
* S. I. Smith, in Ann. Rep. U. S. Fish Comm. for 1885, p. 682, 1886. 
+ Ill. Zool. H. M. I. M. 8. * Investigator,” Crustacea, Plate II], 1892; Ann. Mag. Nat. Hist., 6th 
Ser., XI. 164, 1893. 
