206 BULLETIN OF THE 



Family MIERSIID^. 



Acanthephyra cristata, sp. nov. 



Differs from A. debilis A. M. Edvv. {= A. gracilis Smith) in having a much 

 shorter and fevver-spined rostrum, two pairs of longitudinal lateral carinse on 

 the carapace, a dorsal carina on the fourth abdominal segment, and by the ab- 

 sence of a series of denticles on the posterior margin of the dorsum of the fourth 

 and fifth abdominal segments. 



From A . lanceolata (Systellaspis lanceolata Bate) it also differs by having the 

 rostrum shorter, the lateral and dorsal carinae of the carapace more prominent, 

 and by the absence of a prominent tooth on the anterior margin of the first 

 abdominal segment. 



This species, like A. debilis and A. lanceolata, has no carina on the dorsal 

 surface of the fifth and sixth abdominal segments. 



Length, 78 mm,; rostrum, 13 mm.; carapace, including rostrum, 27.5 mm. 



Station 3361, 1471 fathoms. 1 specimen. 

 " 3381. 1772 " 1 



Acanthephyra cucullata, sp. nov. 



The integument is soft, membranaceous, and transpareut in alcohol. The 

 carapace is carinated in the median dorsal line anteriorly ; this carina is fur- 

 nished 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 orbit are continued downward for some distance 

 nearly parallel with one another in a nearly vertical direction, and then sud- 

 denly 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 spiniferous. The an- 

 tennal spine is acute, and advanced forward of the infra-orbital angle. The 

 branch iostegian spine is small and continuous with a longitudinal carina that 

 runs along the branchial region of the carapace. A low fold or ridge marks 

 the upper boundary of the branchial region. 



The abdomen is carinated in the median dorsal line on the second to the 

 sixth segment inclusive ; the carina is most prominent on the third segment, 



