16 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 122 



total of 4 bristles; surface of 2nd-5th joints with fine hairs; epipodial 

 appendage with about 33 hirsute bristles. 



Sixth liinb (fig. 6c): single endite with 3 spinose bristles; end joint 

 with 10 spinose bristles forming 2 rows separated by space from 

 2 long hirsute posterior bristles and with long hairs on posterior 

 margin and medial surface. 



Seventh limb (figs. Qd, e): terminal end with comb of about 6 

 teeth opposite smaller comb with 4-5 teeth; 6 bristles in distal 

 group, 3 on each side; 4-6 bristles in proximal group; all bristles with 

 2-5 distal bells. 



Seventh limbs from 3 Pacific and 3 Atlantic specimens were ex- 

 amined. All had 6 terminal bristles. The Pacific specimens and 2 

 of the Atlantic specimens had 4 bristles in the proximal group. The 

 3rd Atlantic specimen had 5 bristles on one appendage and 6 on the 

 other. The number of bells on proximal bristles varied, with some 

 specimens having 3-4, and others with as many as 5 or as few as 2. 



Furca (fig. 6/): each lamella with 5 curved claws decreasing in 

 length posteriorly; claw no. 1 joined to lamella; with lateral and 

 medial spines in row along concave margin; 5th claw with minute 

 spines along concave margin; margin of each lamella posterior to 5th 

 claw with clusters of fine hairs; anterior margin of each lamella 

 above base of 1st claw with 2 minute spines; surface above lamellae 

 with numerous spines. 



Cushman (1906, p. 363, 365, pi. 27: fig. 6) apparently overlooked 

 the clusters of fine hairs on the margin of each lamella posterior to 

 the 5th claw. 



Genitalia (fig. 6/): two large vaginal openings present anterior to 

 5 small ringed bristles. 



Frontal organ (fig. Qg) : with short proximal joint and elongate 

 terminal joint with rounded tip. 



Eyes: medial eye large pigmented (fig. Qg); lateral eyes similar 

 in size to medial eye and uith 6-7 ommatidia (fig. Qh). 



Eggs: Each gravid female has to 5-16 ovate eggs in the brood 

 pouch, with most specimens having 10-11 eggs. All eggs in the 

 brood pouch of a single specimen are about the same size but oc- 

 casionally 1-2 are smaller than the average. Some specimens contain 

 unextruded eggs in addition to eggs in the brood pouch. These are 

 smaller than those in the brood pouch. Each egg appears mottled 

 and is enclosed in an individual transparent sheath. Only 1 speci- 

 men contained larvae. 



Description of adult male. — Shell (figs. 3c, d; la-c): symmetrical 

 in dorsal view with acuminate caudal process; suboval in lateral 

 view except for rostrum, shallow anterior sinus and truncate posterior 

 (fig. 3c) ; surface ornamented with punctae and 3 raised ribs radiating 



