278 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 5 |j 



Ammothella hi-unguiculata (Dohrn) p. 297 



This is perhaps as widespread a species as any pycnogonid. I have 

 found it from Lower California to southern California. It occurs 

 also off Hawaii and Japan, to say nothing of its original descrip- 

 tion by Dohrn in the Mediterranean. It is chiefly a shore form, i 



Ammothella heterosetosa, new species p. 299 



This is from the Galapagos Islands. Specimens in U.S. National 

 Museum. i 



Nymphopsis spinosissima (Hall) p. 300 



Chiefly along shore, southern California and Lower California. 



Nymphopsis duodorsospinosn, new species p. 303 



Lower California. 



Eurycyde longtsetosa, new species p. 305 



Off Colombia, South America. U.S. National Museum specimens. 



Pycnogonum hancocki Schmitt P- 308 



Shore, Galapagos Islands. 



Pycnogonum panainum, new species P- 310 



Near Panama Canal, Pacific side. U.S. National Museum speci- 

 mens. 

 All measurements are in mm. 



Family N^Tnphonidae Hoek, 1881 



Chelifori long, 2-jointed, chelate, with chelae usually held before the 

 mouth. Palpi 5- to 7-jointed, longer than the rather short proboscis. 

 Ovigera well developed in both sexes, 10-jointed, sometimes 8-jointed, 

 with the end widened and with spines in most cases. Body usually elon- 

 gate, segmented with suture lines showing. The 1st or ocular segment is 

 usually broadened at its cephalic end. The neck extends in front of the 

 1st pair of legs. 



Genus NYMPHON Fabricius, 1794 



Body smooth, more or less slender, cylindrical, with well-defined lat- 

 eral processes. Cephalic segment large, with marked neck and an ex- 

 panded forward part. Caudal segment small, cylindrical. Eye tubercle 

 more or less elevated, eyes usually equal, at the base of the proboscis. 

 Proboscis rather thick, cylindrical, smooth, rounded at its end, not usually 

 long. Chelifori well developed, hand narrow, fingers usually shorter than || 

 the palm and finely dentate on the inner margins. Palpi moderate length, 

 1st joint small. Terminal joints shorter than the 2nd or 3rd, often quite 



