ACANTHEPHYRA CUCULLATA. 167 
Through Var. y, A. ewrtirostris approaches A. acutifrons Bate, but in the 
latter the carapace is much larger and longer in relation to the abdomen, the 
dorsal carina of the carapace is more complete behind the rostral teeth, 
the first abdominal segment is carinated, the telson is shorter and bears fewer 
lateral spines, and, finally, an ocellus is present. 
Acanthephyra brevirostris Smrru. 
Proc. U. 8. Nat. Mus., VIT. 504, 1885; Ann. Rep. U. S. Fish Comm. for 1885, p. 670, Plate XIV. Fig. 2, 
Plate XV. Fig. 2, 8, Plate XVI. Fig. 1, 6, 1886. 
Station 3399. 1740 fathoms. 1 male. 
In this specimen there is a small tooth on the lower margin of the 
rostrum which is wanting in the specimens from the Atlantic side of the 
continent, and the great tooth of the third abdominal segment is not quite 
so large as in the typical specimens. 
The integument in this species is soft and membranaceous, as in the 
genus Hymenodora. Spence Bate has described a closely allied form under 
the name of Hymenodora duplex.* 
Spence Bate in 1888} applied the specific name drerostris, already appro- 
priated by Smith, to a very different species of Acanthephyra from the tropical 
Atlantic. It hence becomes necessary to change the name of Bate’s species, 
which I propose to call, in memory of its describer, Acanthephyra bate. 
Acanthephyra cucullata Fax. 
Plate XU1LV:, Hig. tle 
Bull. Mus. Comp. Zodl., XXIV. 206, 1893. 
The integument is soft, membranaceous, and transparent in alcohol. 
The carapace is carinated in the median dorsal line anteriorly ; this carina 
is furnished with seven minute teeth, and is continued forward to a very 
small acicular rostrum, which hardly reaches forward to the end of the eyes ; 
the infero-lateral margins of the rostrum are continued downward for some 
distance, nearly parallel with one another, in an almost vertical direction, and 
then they suddenly diverge and trend backward, forming the upper wall of 
the orbit; a sort of hood is thus formed of the anterior part of the carapace, 
overhanging the facial region. The infra-orbital angle is rounded, not spinif- 
erous. The antennal spine is acute, and advanced forward of the infra- 
* Rep. Challenger Macrura, p. $43, Plate CXXXVI. Fig. 3, 1888. 
+ Op. cit., p. 751. 
