AMPHIPODA OF THE FAMILY AMPELISCIDAE 



COLLECTED IN THE EASTERN PACIFIC 



OCEAN BY THE VELERO III AND VELERO IV 



By 



J. Laurens Barnard 



Plates 1-38 



Amphipoda of the family Ampeliscidae form an important compo- 

 nent of any littoral marine soft-bottom fauna. The amphipod collections 

 of the Allan Hancock Foundation, assembled in part from numerous 

 dredge hauls on soft-bottom areas, contain a large number of ampe- 

 liscids. For the most part, these materials were obtained by expeditions of 

 the Velero III and Velero IV, motor cruisers of Captain Allan Han- 

 cock. In addition, several individuals have contributed small personal 

 collections of Ampeliscidae to the Foundation. 



The present paper deals with material collected in the Eastern Pa- 

 cific Ocean : along the coast of the Americas from Puget Sound, Wash- 

 ington, to Peru, the Gulf of California, and the Galapagos Islands. 



The writer is indebted to the following persons for aid in preparing 

 this paper: to Captain Allan Hancock and the administration of the 

 Foundation for the use of laboratory space and equipment ; to Dr. John 

 S. Garth for supervision of the study and critical counsel; to Dr. John 

 L. Mohr for the use of reprints and the donation of material; and to 

 Dr. James E. Lynch of the School of Fisheries, University of Washing- 

 ton, Seattle, for the donation of material from Puget Sound. 



Systematic Discussion 



Ampeliscidae from the Eastern Pacific Ocean have been reported 

 upon by Stimpson (1864), Holmes (1908), Stout (1913), and Shoe- 

 maker (1916 and 1942). Stimpson in 1864 described Ampelisca pugetica 

 from Puget Sound, Washington; Holmes (1908) described six new 

 species of Ampelisca collected by the Albatross from Monterey, Cali- 

 fornia, and the Channel Islands off southern California. His species 

 were: Ampelisca cristata, A. calif ornica, A. coeca, A. plumosa, A. pa- 

 cifica, and A. lobata. Ampelisca californica is considered by this writer 

 a synonym of A. pugetica Stimpson. Material of A. plumosa and A. coeca 

 is not present in the available collections. In addition to the species of 

 Ampelisca, Holmes reported upon the presence of Byblis gaimardii 

 (Kr<^yer, 1846) and Haploops tubicola Lilljeborg (1855). No mem- 

 bers of the genus Haploops are present in the collections at hand and 

 Byblis is represented only by a single species, new to science. It is un- 

 til 



