218 BULLETIN OF THE 
In full-grown specimens of S. agassizii, which attain a length of 150 mm., 
the antennulary flagella are only one half as long as the carapace, or even less. 
The flagellum of the second antenna is very slender and enormously long, — 
more than two and two thirds times the length of the whole body. The num- 
ber of teeth on the rostrum and gastric region is nine. 
Length of an adult female, 149 mm.; carapace, with rostrum, 54 mm.,; ros- 
trum, 13.5 mm.; second antenna, 410 mm. 
Station 3389. 210 fathoms. 2 males, 8 females. 
Lin Bool.” Las vs 5 males, 6 females. 
A Solenocera has been recently recorded from the Bay of Bengal by Mr. J. 
Wood-Mason.!_ In this species the antennulary flagella are described as being 
shorter and broader than in any previously described species. As no other 
characters are mentioned, it is impossible to tell whether it is the same as the 
“ Albatross” species. When the remoteness of the localities is considered, it 
seems hardly warrantable to assume the identity of the East Indian and Amer- 
ican species of a comparatively shallow-water genus. 
Peneopsis diomedee, sp. nov. 
Integument hard, firm, and smooth. Rostrum long, nearly horizontal, ex- 
cept near the tip, where it is bent up slightly, acute, armed with four teeth 
above. A dorsal carina, armed with one tooth on the posterior part of the 
gastric region, runs the length of the carapace. Cervical groove very deep, but 
not cutting the dorsal carina. Another deep groove runs backward, and then 
diagonally upward from the cervical groove toward the posterior border of the 
carapace, stopping just short of the posterior margin. Antennal region well 
defined by the cervical groove below and a gastro-antennal groove above. A 
strong antennal tooth on the margin of carapace, below the orbit, another at 
the infero-lateral angle, a third just behind the groove that marks the posterior 
limit of the antennal region, and a fourth on the hinder edge of the cervical 
groove. Above and behind the last mentioned tooth the cervical groove is 
indented, and the upper angle of this indentation tends to assume the form of 
a small tooth or spine. 
Fourth, fifth, and sixth abdominal segments carinate on the median dorsal 
line, and produced to teeth posteriorly. Telson deeply grooved on dorsal side, 
and armed with a pair of spiniform lateral teeth near the tip. The antennules 
with their long flagella surpass the whole body in length; the prosartema is 
oval, foliaceous, reaching forward as far as the posterior border of the upper 
face of the cornea. The exopods of the second maxillipeds are very small, not 
longer than the short ischial segment of the limb. Upon the appendages back 
of these, the exopods are reduced to the merest rudiments, discernible only by 
the use of a lens. In some individuals, indeed, the exopods of the posterior 
appendages are altogether wanting. 
1 Solenocera hextii Wood-Mason, Ann. Mag. Nat. Hist., 6th ser., VII. 188, 1891. 
