PYCNOGONIDS FROM PUGET SOUND — EXLINE 419 



The anterior or cephalic part without neck, widened anteriorly and 

 ending on each side in a small protuberance tipped with a bristle, 

 like lateral processes. Anteriorly, cephalic part bearing a moder- 

 ately high eye tubercle, which slants slightly forward and is rounded 

 except for a very small pointed peak. Eye tubercle bearing four 

 eyes, which are somewhat elongated parallel to axis of tubercle and 

 are all basal. 



Cheliferi half as long as proboscis; not chelate in adult, but im- 

 mature specimens show definite and well-developed chelae; basal 

 segment or scape elongate; second segment short and almost round. 

 Cheliferi genth^ bowed toward one another. 



Palpi 8-segmented; first segment short, second long, third sliort, 

 fourth equal in length to second ; fifth, sixth, seventh, and eighth all 

 very short, subequal, and thickly clothed with hair. 



Ovigera 10-segmented ; first two segments quite stout, not much 

 longer than wide and almost equal in length ; third segment as long 

 as segments 1 and 2 together and slenderer; segment 4 equal in 

 length and width to 3, somewhat curved, and also armed with a few 

 small spines ; segment 6 shorter than 5, armed with very few spines ; 

 segment 7 A^ery short, a little heavier than preceding, as wide as 

 long, on its outer side armed with a group of four long stout spines ; 

 segment 8 equal in length to 7 but slenderer, armed dorsally with 

 one spine; segment 9 as long as 7 and 8 together, armed with two 

 or three scattered spines ; segment 10 or terminal segment very small 

 and difficult to separate from preceding, armed at its termination 

 with two large spines but no claw. Ovigera in the male consider- 

 ably longer than in female; the tips of the ovigera curled in both 

 sexes. Small groups of eggs may be attached to the ovigera of the 

 male on the fourth and fifth segments; although the number of the 

 egg groups is not constant, there are usually several ; the type speci- 

 men has seven groups per ovigera. 



Legs short, about equal in length, covered with microscopic tuber- 

 cles, stout, armed with scattered spines, terminating in well-devel- 

 oped claw and pair of strong auxiliary claws. Coxa I 0.5 mm, with 

 a long narrow tubercle that is not quite half so long as the segment 

 and armed distally with a short spine, situated on the posterior, 

 dorsal, distal margin ; on its anterior distal margin armed with a 

 small tubercle from which two or three spines arise, as wide as long; 

 coxa II 0.7 mm, armed on both sides with several spines; coxa III 

 0.5 mm ; femur 1.5 mm, heavier from center to tip, especially swollen 

 in female, armed distally with a short protuberance and spine; tibia 

 I 1.4 mm, armed dorsally with several short spines; tibia II, 1.3 mm, 

 armed dorsally with numerous short spines; tarsus I very short, 



