SOME PUGET SOUND ASCIDIANS. 601 



villosa, and if he is right the two would seem to be quite distinct, 

 although closely allied. They appear to differ both in external 

 and in internal characters. As Herdman collected his specimens 

 himself, he would have undoubtedly noted the pink color of the 

 rather prominent siphons, had they been present, which disting- 

 uishes C. castancifonnis (Figs. 6 and 7). 



Again, the spines of C. villosa appear to be both longer over 

 the anterior portion of the body and to extend back over the 

 pedunculated portion considerably more than is the case in C. 

 castancifonnis. 



As to internal structure although the two forms agree in the 

 number of folds and the peculiarity as to direction of the stig- 

 mata, they differ markedly in the absence from the sac of C. vill- 

 osa of the internal transverse vessels and the regular interserial 

 spaces or vessels. (Compare Herdman's description and PI. 

 XII., Fig. 1 1.) Again it appears that the dorsal languets of C. 

 castaneiformis are considerably more numerous and filiform than 

 in C. villosa. 



There are numerous specimens in the collection, and in addi- 

 tion it has been collected at several other points on our Coast 

 south of Puget Sound. 



Cynthia haustor Stimpson. 

 (PI. XVIII., Figs. 8, 9 and 10.) 



Cynthia haustor Stimpson, .'64, p. 159. 



Cynthia haustor von Drasche, '84, p. 372, PI. III., Figs. 3 

 and 8. 



Cynthia haustor Traustedt, '84, p. 29. 



Cyiithia haustor Herdman, '98, p. 257, PI. XIV., Figs, i 

 and 2. 



But a single specimen of the species is contained in the col- 

 lection ; but as this is one of the most common representatives 

 of the genus on our shore, north of San Francisco Bay, there 

 can be no doubt as to its identification. 



I am glad to be able to present the excellent figures drawn 

 from the living animal by Doctor Dean. 

 . Annals N. Y. Acad. Sci., XII, May 28, 1900 — 38. 



