ATLANTIC AND CARIBBEAN PYCNOGONIDA—HEDGPETH 211 
mens but lacking in others. Hence I cannot keep the two species 
apart. Nor, for that matter, can I find any well-defined character for 
separating Pallenopsis oscitans (Hoek), dredged by the Challenger 
west of the Azores from 1,675 fathoms. The chelae are very similar, 
and the expanded appearance of the front margin of the cephalic 
segment in Hoek’s figure is not of specific importance and may be 
more apparent than real. Pallenopsis longirostris appears to be a 
variable species, and the variation in this handful of specimens in- 
dicates that both plumipes and oscitans should be included under this 
name. 
Distribution.—Northeastern Atlantic, Cabot Strait, and Western 
Atlantic as far south as latitude 32° N., 79 to 1,675 fathoms. 
PALLENOPSIS CALCANEA Stephensen 
Figure 21, e-g 
?Pallenopsis sp. Gordon, 1932, pp. 91-92, fig. 45, a-c, fig. 74, c. 
Pallenopsis calcanea STEPHENSEN, 1933, pp. 21-24, fig. 5. 
RECCRD OF COLLECTIONS 
Bermuda circle [center, lat. 32°12’N:, long. 64°36’W.], Net 206, 660 fathoms 
(deep tow), June 22, 1929, William Beebe coll., 1 female. 
This specimen is about the same size as those described by Steph- 
ensen. It appears to be a mature female; the genital pores are large, 
on slight elevations of the dorsal surface of the second coxae. The 
rudimentary (or vestigial?) palpus is larger than in Stephensen’s 
material, and the development of the heel seems to be intermediate 
between the Godthaab specimens from Davis Strait and off Labrador 
and Gordon’s immature specimen from Discovery station 256 (lat. 
35°14’S., long. 6°49’E., off South Africa; a deep tow between 850-1,100 
meters). There is a suggestion of a vestigial auxiliary claw in this 
specimen. Inasmuch as Stephensen did not give detailed measure- 
ments, the following should be of interest: 
Proboscis: Mm. | Third leg: Mm. 
erste ae ag twirl 2a 2.0 rst coxa _ulx a Stone 1. 75 
Diameter at tips 22-22 2252" 0. 6 Second COxXase ss oe eee 2.18 
SUB TK te ees ed ee Bh ‘Lhirdseoxaget) «20 ease 1. 25 
Cephalic segment__.._____-___- to 12301) Seems ope ens 2. ame ry Pea BR 5. 7 
Wid bh bc been fo rey ts 2.+ Hirst tibial cela e ove bree J 5. 75 
SELIG 0125 0 ah RR a O75 Second tibia. 2 22. ee 4. 50 
SCA omer s ere eo eke 1.9 TRATSUSHom ah = es Vote oe eee 0. 48 
IPrOpOdUs ie 2 2 ek Rae oe 1.0 
Clawe hee Vs a 0. 6++ 
Disiribution.—Evidently a bathypelagic species of the North and 
(probably) South Atlantic, and the southern Indian Ocean, occurring 
at depths of from 500 to 1,000 fathoms. It may be world-wide. 
