PYCNOGONIDS FROM ALLAN HANCOCK EXPEDITIONS 



(Plates 35-48) 



By William A. Hilton 



Department of Zoology, Pomona College 



FOREWORD 



The pycnogonids of the Allan Hancock Expeditions reported on in 

 this paper represent specimens collected over a period of several years. 

 Through the kindness of the Allan Hancock Foundation of The Univer- 

 sity of Southern California I have been able to examine this valuable 

 collection. Some of the specimens here reported upon were taken out of 

 the Hancock Collections by Dr. Waldo Schmitt of the U.S. National 

 Museum, and these also are included in this paper. 



This paper is an account of specimens of pycnogonids received from 

 the Allan Hancock Foundation. Most of the species mentioned were 

 collected off shore, at moderate depth. In distribution they are especially 

 from oiif southern California, the Gulf of California, and near the 

 Galapagos Islands. They are as follows : 



Nymphon pixellae Scott p. 279 



Numerous examples especially off the California coast. 



Callipallene calif orniensis (Hall) p. 281 



Chiefly southern California coast. 



Anoplodactylus erect us Cole . . p. 283 



This is chiefly a shore form but was also collected off shore in 

 deeper waters from Newport to San Diego. 



Anoplodactylus californicus Hall p. 286 



This seems to be a deeper water form for the most part. Found 

 along the shores of southern California. 



Anoplodactylus robust us Hilton p. 288 



This seems to be found chiefly in deeper waters off shore in south- 

 ern California. 



Tanystylum californicum Hilton p. 291 



Chiefly a shore form in southern California. 



Ammothea latifrons Cole p. 295 



This is a more northern form, being found in Alaskan waters, but 

 one was sent to me from Station 1177-40, north of Santa Barbara 

 Island, off the southern California coast, in 40 fms. 



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