ASCIDIANS COLLECTED IN PUGET SOUND. 251 



possibly be a specialist on all groups of marine invertebrata. 

 For that reason I now abstain from expressing any 

 opinion except in regard to the group of which I have a 

 more intimate knowledge. It seems to me that this 

 matter must be settled by specialists in each group of 

 animals stating their opinions as to the genetic affinities 

 of the northern and southern faunas in their own groups 

 quite apart from and uninfluenced by general lists contain- 

 ing other groups. The Tunicata instanced by Dr. Murray, 

 both in his " Challenger Summary" and in his paper on 

 the "Marine Fauna of the Kerguelen Region," help to 

 swell lists that assume rather imposing dimensions, but 

 when I examine the case of these species and genera of 

 Tunicata individually, I find that the records of occurrence 

 have to be added to or modified in such a way as to 

 entirely change the nature of their evidence, and show that 

 there is no such close resemblance between the northern 

 and southern polar faunas as Dr. Murray and others have 

 supposed. 



In 1861 Stimpson published a brief account of some 

 new simple Ascidians obtained from Port Townsend and 

 other localities in Puget Sound. His list is as follows : — • 



Chelyosoma production, St. ; Cynthia haustor, St. ; C. 

 gibbsii, St. ; C. coriacea, St. ; and C. villosa, St, 



I believe that I also obtained all these species, except, 

 perhaps Cynthia coriacea* and in addition I collected 

 five other species which are new to science. Stimpson's 

 species were, however, so briefly described, without figures, 

 that they can scarcely be said to be known to science. 

 Dr. von Drasche, in 1884, re-described and figured Chelyo- 



* Which I would suggest may possibly be merely a variation of Cynthia 

 haustor, a very common and somewhat variable species. The name coriacea 

 was pre-occupied by Cynthia coriacea, A.ld. and Hanc, 1848, and so must 

 lapse in any case. 



