164 STALK-EYED CRUSTACEA. 
two pairs of longitudinal lateral carine on the carapace, a dorsal carina on 
the fourth abdominal segment, and in the absence of a series of denticles on 
the posterior margin of the tergum of the fourth and fifth abdominal seg- 
ments. From <A. danceocaudata (Bate) it also differs in its shorter rostrum, 
more prominent lateral and dorsal carine of the carapace, and the absence 
of a prominent tooth on the anterior margin of the first abdominal segment. 
Acanthephyra curtirostris Woop-Mason. 
Plate XLII, Fig. 2-5. 
Aun. Mag. Nat. Hist., 6th Ser., VII. 195, 1891, IX. 364, Fig. 5, 1892; Ill. Zool. H. M. I. M. S. “ Inves- 
tigator,” Crustacea, Plate III. Fig. 4, 1892. 
This species is thus briefly characterized by Wood-Mason: “ Closely allied 
to A. acutifrons Spence Bate, differing therefrom in its shorter and smaller 
carapace and in its much less produced rostrum, which does not reach be- 
yond the middle of the terminal joint of the antennulary peduncle and is 
armed on its upper margin with nine minute saw-like teeth, on its lower 
with a single strongish spine. The ocular papilla embraces the cornea.” 
The type specimens were taken in the Bay of Bengal in 840 fathoms, and 
in the Laccadive Sea in 1000 fathoms. 
In specimens from the “ Albatross” dredgings, which I take to be of the 
same species, the integument is smooth and of a firm consistence. The 
length of the carapace, including the rostrum, is equal to the distance 
from the anterior end of the abdomen to the middle of the fourth abdom- 
inal somite. The rostrum does not reach beyond the second segment of 
the antennular peduncle; it is very deep at the base, and ends in a short 
and acute tip; the superior margin is inclined upward at a small angle 
with the axis of the body, and is armed with a line of eight or nine 
teeth which runs nearly to the tip of the rostrum; the lower margin is 
armed with one strong tooth. Behind the superior row of teeth the dorsal 
margin is continued back as a low rounded ridge, which disappears before it 
attains to the hind margin of the carapace. The anterior margin of the cara- 
pace is prominently angulated below the eye, above the antennal spine. The 
antennal spine is short, flattened, and continuous with a longitudinal carina on 
the hepatic area. A low, obtuse ridge bounds the branchial. regions above, 
and the gastric region is separated from the cardiac by a shallow, obsolescent 
furrow. The second to the sixth abdominal somites are carinated in the 
median dorsal line, the carina terminating in a sharp tooth at the posterior 
