UNIVERSITY OF CALIFORNIA PUBLICATIONS 



IN 



ZOOLOGY 



Vol. 13, No. 8, pp. 175-234, plates 11-12 October 12, 1914 



POLYCHAETOUS ANNELIDS OF THE PACIFIC 



COAST IN THE COLLECTIONS OF THE 



ZOOLOGICAL MUSEUM OF THE 



UNIVERSITY OF CALIFORNIA 



BY 



AAEON L. TREADWELL 



The following paper contains a list of old, and a description of a 

 few new species of Pacific polychaetous annelids belonging to the 

 University of California which, through the courtesy of Professors 

 W. E. Hitter and C. A. Kofoid, were submitted to me for study. As 

 a result of the earlier papers of Johnson, and the later elaborate work 

 of Moore, our knowledge of the Pacific coast Polychaeta is very 

 complete and I was prepared to find, what proved to be actually the 

 case, that the greater number of the specimens submitted to me had 

 already been described. 



Twelve new species were found in the collections and are here 

 described : Panthalis pacifica. Nereis notomacula, Spio acuta, Scoleco- 

 lepis alaskensis, Polydora californica, Strehlosoma crassihranchia, 

 Trophonia minuta, T. infiata, Ophelina magna, 0. mucronata, Laonome 

 oculifera, and Branchiomma disparoculatum. 



While it was not my original intention to do more than publish 

 a description of these new species, I have, at the request of Professor 

 Kofoid, included all of the old, with the intention of thus securing a 

 more complete and easily accessible list of the localities from which 

 the various species were collected, as well as a record of whatever 

 data concerning depth of water and character of bottom were avail- 

 able. The collections included some material from Honolulu and 

 from localities along the coast as far north as Alaska, as well as 



