NO. 9 HILTON : PYCNOGONIDS 307 



rather straight. It ends in a rather short, prominent claw. It bears several 

 long hairs on its upper surface and slight indications of sinisterlilce claws 

 on its lower surface. Type of male from a lot of 3 males with eggs. U.S. 

 National Museum, Station 423-35, Point Utria, Colombia, close to 

 shore, north of Point, north of island, January 25, 1935, 20 fms., acces- 

 sion no. 131571. This species is much like E. hispada Kroyer, but the 

 hairs seem very much longer, some 0.5 mm. or longer. In hispada no hairs 

 are seen on the ocular eminence. There are 2 in this species. The 1st 

 coxal joint does not have the long processes of this species. The hairs on 

 the legs of this species are fewer, larger, and differently arranged. 



Measurements: Base of the chelifori to 1st segment lines, 0.45; 

 between 1st and 2nd segment lines, 0.2; 2nd and 3rd segment lines, 0.2; 

 3rd line to the end, 0.2. Total length not including proboscis, 1.05. 

 Length of transverse process, 0.35 ; body width between transverse proc- 

 esses, 0.25; total body width, 0.95. Proboscis, 1st joint, 0.36; 2nd, 0.54 

 long by 0.12 to 0.3. Abdomen, 0.48 by 0.06 to 0.08; hairs on abdomen, 

 0.5. Ocular eminence, 0.225 by 0.1 ; hairs, 0.3. Chelifori, 1st joint, 0.3 

 by 0.075; 2nd, 0.30 by 0.04; 3rd, 0.075 by 0.05; hairs, 0.22. Palpi, 1st, 

 0.075 by 0.1 ; 2nd, 0.025; 3rd, 0.4 by 0.04; 4th, 0.125; 5th, 0.25; 6th, 

 0.075; 7th, 0.075; 8th, 0.075; 9th, 0.065; 10th, 0.065. Ovigers, 1st 

 joint, 0.1 by 0.1; 2nd, 0.15 by 0.1; 3rd, 0.175 by 0.087; 4th, 0.45 by 

 0.075 ; 5th, 0.4 by 0.088 ; 6th, 0.3 by 0.25 ; 7th, 0.15 by 0.075 ; 8th, 0.15 

 by 0.05 ; 9th, 0.1 by 0.05 ; 10th, 0.1 by 0.065. Ambulatory legs, 1st joint, 

 0.2 by 0.15; 2nd, 0.2 by 0.1 to 0.2; 3rd, 0.2 by 0.15; 4th, 0.575; 5th, 

 0.85 ; 6th, 0.85 ; 7th, 0.675 by 0.04; 8th, 0.5 by 0.05 to 0.052. Claw, 0.25 

 by 0.037. 



Family Pycnogonidae Dohrn 



The cheliforus or first appendage pair is lacking. The palpus or 2nd 

 appendage pair is lacking. The oviger or 3rd appendage pair is found only 

 in the male. It is 10-jointed, the last joint is a terminal claw. The body is 

 compact, the legs thick and comparatively short. There are usually 4 pairs 

 of legs, sometimes 5. The sex openings in both sexes are in the 4 legs, in 

 the last 4 if there are 5 pairs of legs. 



Genus PYGNOGONUM Brunnich, 1764 



Trunk stout, legs short, ovigera only in the male. First tarsal joint 

 small. Claws simple. 



