Miscellaneous. 243 



Channel ; and, in this respect, tlic fauna of Jersey presents 

 a great analogy with that of Koscoff, investigated by Giard. 

 I will cite, in the first place, A^ilidium zostericola^ Giard, very 

 common on the Zosteroi ; and the Amaroucia, some species of 

 which [A. Nordmanm, A. j^roUferujn, and^. albicans^ Edw.) 

 are very abundant. The Amaroucia are frequently associated 

 with Fragarium elegans and MorchelUum argus^ described by 

 Giard. 



Didemnum is represented by a very common species form- 

 ing small corms of variable colour, generally tending to bright 

 yellow or grey, which may be referred to D. sargassicola^ 

 Giard. The genus LeptocUnum is very generally distributed; 

 it includes, in the first place, L. maculosum, Edw., forming 

 very extensive violet-coloured corms which are found at the 

 base of the stems of Laminaricc. Associated with this, and 

 exceedingly common, is L. asperum, Edw.; L. durum, Edw., 

 and L.fidgidum, Edw., form greatly developed sheets, which 

 cover the rocks j L. gelatinosum, Edw., lives in similar 

 situations. 



A new Diplosoma is abundant at Jersey ; I have found it 

 especially upon the Laminarice. M. Lahille, who had also 

 observed it at Roscoff, has described it under the name of 

 D. KoeJderi. 



The Botryllidse are represented by Botrylloides rotifera and 

 B. rubrum, Edw., and by numerous Botrylli. Besides some 

 types, which by their coloration cannot be referred to any 

 species described by Giard, I have met with : B. ScJdosseriy 

 Sav., generally the variety adorns, Giard, B. prumosus, 

 Giard, B. smaragdus, Edw., B. vtolaceus, Edw. (numerous 

 varieties), B. aurolineatus, Giard, B. morio, Giard, and B. 

 rubigo, Giard j the last two species are not so frequent as 

 the others. 



[To he contiuued.] 



MISCELLANEOUS. 



Freshwater Sponges from Newfoundland : a new Species. 

 Ey Edward Potts. 



The author stated that in the latter part of August 1885, Mr. A. 

 H. MacKay, of Pictou, Nova Scotia, whose success as a collector of 

 freshwater sponges in his own neighbourhood has been already re- 

 corded (Proc. Acad. Nat. Sci. Philad. 1884, p, 215, &c.), made a 

 scieutitic visit to the island of Newfoundland. His explorations 



