276 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 97 
less conspicuously so on trunk and legs. The body integument is 
also covered with minute tubercles. 
Proboscis about as long as trunk, slightly curved, largest at tip. 
Abdomen small, bluntly conical. 
-Palpus slender, longer than proboscis. Second joint longest, fourth 
slightly shorter. Sixth and seventh joints subequal, longer than 
fifth, eight and ninth subequal, longer than fifth. Joints 4 to 9 with 
small setae. 
Oviger: Basal joints small, subequal. Fourth joint longest, 
straight, largest distally, sixth joint not quite so long as fourth. 
Terminal joints diminishing in size, with several rows of spines, as in 
Colossendeis. 'Terminal claw scoop-shaped. 
Leg: Long, slender, with scattered fine setae and a prominent 
chitinous line extending out to the propodus. Tarsus and propodus 
subequal, propodus with a row of small spines on the sole. Terminal 
claw about three times as long as within at base, blunt. 
Measurements.—As follows: 
Proboscis: Mm. | Fourth leg: Mm. 
Reap A see, Sy os 3. 1 Cpripec oleate nae 1.5 
Piameter: 4 0 iS. 2. 2.82 0. 6 Bemur. 223) eee ee 7. 75 
CM CL ae ee: ee 7 od a eae 6 3.5 Hirst tibigg: 208 35. see 8.5 
Cephalic segment__.__--------- 1.0 pecond, tibia: 64. e252 82 6.5 
Third trunk segment, width.___ 1.5 arsubee4 2-8. does eae 1.5 
ABteMmene. cats eo oer, as aD Propodus:.— ee hee 1, 25 
Terminal claw. 3. -p - ae 0.5 
Remarks.—The second pair of legs of the holotype and the specimen 
from University of Iowa Station 64 are shorter than the other legs and 
of slightly less diameter. This difference is most marked in the 
tarsal joints (fig. 51, d, e). Genital pores seem to be present on all 
five pairs of second coxae of the holotype and on the last four pairs of 
the paratypes. They do not seem to be on the second pair of legs in 
the Pourtalés specimen but may not yet have developed. Such pores 
as could be made out seem to be too large for the male, and the sexual 
determination must be considered tentative. 
Family PYCNOGONIDAE Wilson, 1878 
Chelifores and palpi absent Oviger 6- to 9- jointed, with a large 
terminal claw which is considered by some to be another segment, 
present only in the male. The propodus is well developed, but without 
a heel or heavy basal spines. Members of this family are chacterized 
by short, knobby legs, which gives them an oval appearance. There 
are two genera, the octopodous Pycnogonum and the decapodous 
Pentapycnon: 
daaPour pairs pf -legeee 4) ae cle led ile ele dt ne Pycnogonum (p. 277) 
[Re Sr Oe PE Re ethic tk are ke Ree i ee Pentapycnon (p. 281) 
