ASCIDIAXS COLLECTED IN PUGET SOUND. 257 



This species, in its appearance, recalls that variety 

 of Ascidiella aspersa, O.F.M., of European seas, which 

 Alder and Hancock described as Ascidia pustulosa ; the 

 present species differs, however, in the papillae on the 

 branchial sac and other particulars. 



Fig. 1, PL XII., shows Ascidiella griffini from the right 

 side, natural size ; fig. 2 gives the dorsal tubercle and 

 neighbouring parts, magnified ; and fig. 3 is a small part 

 of the branchial sac from the inside, showing the unusually 

 wide meshes and the large papillae. 



Cynthia Jiaustor, Stimp. PL XIV., figs. 1 and 2. 



This species was very briefly and insufficiently described 

 by Stimpson* in 1864, but since then von Drasche has 

 re-described t the species with all necessary detail. 



Our specimens, of which we have over 130, agree per- 

 fectly with v. Drasche' s description and figures. That 

 author speaks of the individuals adhering together in 

 masses, but he figures only a solitary individual. The 

 aggregated habit is, however, quite characteristic of the 

 species, and by far the majority of the many hundreds I 

 dredged in Puget Sound, both at Port Townsend and off 

 Victoria, B.C., were attached in masses of about twenty 

 individuals on the average. Some of the large masses 

 dredged up in Scow Bay, and which I was unable to 

 bring away because I had no vessel large enough to put 

 them in, must have contained several times that number 

 of individuals. I give here a couple of figures (PL XIV., 

 figs. 1 and 2), showing the general appearance of these 

 •masses of adhering Cynthia haustor. Occasionally other 

 species of Tunicata, Chelyosoma productum and Styela 

 gibbsii are found attached to the masses. 



* Proc. Philaclel. Acad., U.S., 1864, p. 159. 

 t Deuksolir. K. Akad. AViss. Wien, 1884, p. 372. 



