248 



DESCBIPTION of SOME SIMPLE ASCIDIANS 



COLLECTED in PUGET SOUND, PACIFIC 



COAST. 



By Prof. W. A. Hebdman, D.Sc, E.K.S. 



With Plates XL to XIV. 



[Read May 13th, 1898.] 



In a previous paper in this volume (" Transactions," 

 p. 84) I have recounted the circumstances under which I 

 enjoyed a few days dredging and shore collecting about 

 Port Townsend, in Washington State, and Victoria, 

 British Columbia, in September, 1897. In that paper 

 preliminary lists of the species obtained in all groups 

 were given ; and the Copepoda were more fully described 

 by Mr. I. C. Thompson and Mr.. Andrew Scott. The 

 remaining Ceustacea will be dealt with in a separate 

 paper by Mr. A. 0. Walker (see p. 268) ; while, in the 

 present paper, with the help of Miss J. H. Willmer, I 

 shall describe the Tunicata, several of which are new to 

 science. In this way we hope to have all the papers to 

 be published afc present in regard to this little collection 

 of marine invertebrates fromPuget Sound printed together 

 in the same volume of our " Transactions," a matter of 

 no little convenience to those desiring to refer to these 

 faunistic papers. 



All the Tunicata described are simple Ascidians, and 

 they represent nine species belonging to seven genera ; 

 five of them are new, and the remaining four are all 

 interesting forms important for comparison with allied 

 European species, and two of them insufficiently known. 



