igil] ASCIDIANS FROM THE CoASTS OF CANADA. 1 45 



Dorsal lamina with smooth margin, extending behind oesophageal 

 aperture. 



Pharyngeal folds represented by single longitudinal bars, which are 

 very thin and broad. Infundibula as described above. 



Margin of anus lobed. 



Only one gonad and that placed on the inner side of intestinal loop; 

 oviduct accompanying rectum; testes peripheral, their duct or ducts not 

 accompanying oviduct. 



It might be well to retain Bostrichohranchus as a subgenus, if there 

 prove to be species more closely related to E. pilularis than to the typical 

 members of the genus (-E. ghUinans, E. translucida and E. adriatica). 



Goniocarpa placenta (Packard). 



Syn. — Cynthia placenta Packard, Mem. Bost. Soc. N.H., vol. I, 



p. 277, part. 

 ? " pulchella Verrill, Amer. J. Sc, ser. 3, vol. I, p. 99. 



Easily recognized by the small, rounded, granular elevations that 

 thickly cover the test. Near the apertures they are almost papilliform. 

 I have not yet determined the differences (if any exist) between this form 

 and the nearly related European and Pacific forms. It is as variable in 

 shape as they. 



Verrill states that Packard's specimens belonged to two different 

 species and the one which he does not name but describes appears to be 

 this species. Verrill himself probably confused this with Dendrodoa 

 carnea, if the latter was as abundant and widely distributed in the Bay 

 of Fundy when he made his collections as it is now. His Cynthia pul- 

 chella appears to have been a rounded form of one of these species, 

 probably G. placenta. 



Cnemidocarpa mollis (Stimpson). 



Syn. — Glandula mollis Stimpson, Proc. Bost. Soc. N. H., vol. IV,p. 



230. 

 " " Traustedt, Vid. Meddel., ann. 1880, p. 422. 



" arenicola Verrill, Amer. J. Sc, ser. 3, vol. Ill, p. 288. 

 Teihyum arenicolum Hartmeyer, Zool. Anz., vol. 34, p. 147. 

 The two specimens obtained came from 10 fathoms sand not far from 

 the locality from which Stimpson procured his specimens. They corres- 

 pond with the descriptions given by the authors listed in the synonymy. 

 I have placed this species in the genus Cnemidocarpa, as it agrees in the 

 condition of the gonads and atrial tentacles with the type of the genus. 

 It belongs to a group, consisting of forms with radicoid processes of the 

 test to which sand-grains adhere, including Styela vestita Alder and S. 

 villosa (Kupffer). 



