PYCNOGONIDS 



275 



Length of female 1.8 mm., extent about 9.5 mm. 

 Color in alcohol light yellowish. General appearance clean and 

 smooth. 



SPECIMENS EXAMINED. 



J?emarks. — Both of the specimens at hand were females; in one ova 

 could be distinguished in the second and third coxal and femoral joints of 

 the legs, while in the other the character of the ovigera and the fact that 

 genital openings could be plainly distinguished in the usual place on all 

 four pairs of legs left no doubt of its sex. 



AMMOTHELLA SPINIFERA sp. nov. 

 Plate XII, fig. 8 ; plate xx, figs. 7-9 ; plate xxi, figs. 1-6. 



Type. — $ , University of California, No. 19,509, San Diego, California. 



Trunk broad, not especially tapering, the outer anterior corners with- 

 out prominent protuberances ; segmentation distinct ; i or 2 short spines 

 at the base of the eye tubercle, and a longer one on each side of the 

 mid-dorsal line on the posterior border of the first and second segments. 

 Lateral processes well separated, comparatively short, about half as long 

 as breadth of body at second segment, somewhat swollen distally, with 

 a short spine dorsodistally and usually one to each side on the distal 

 border. 



Caudal segment long, slender, about equal to first 2 trunk segments, 

 projecting upward at an angle of about 45°, slightly arched ; armed with 

 several slender spines, those on the dorsal border especially long. 



Eye tubercle narrow, high, erect ; about two thirds as long as caudal 

 segment, v/ith a sharp angle or hip on each side as seen in antero-poste- 

 rior profile ; eyes large, dark, situated at the tip of the tubercle. 



Proboscis about as long as trunk, rather broadly fusiform, as broad as 

 trunk between the first and second lateral processes. 



Chelifori long, reaching to within a short distance of the tip of the 

 proboscis ; first joint nearly as long as second ; second joint clavate ; 

 both this and the first armed with a few short spines. Terminal joint 

 small, rounded, bituberculate, showing evidence of its former chelate 

 condition ; armed with i or 2 short spines. 



Palpi 9-jointed, fully half again as long as proboscis: jj.\ and 3 short; 



