376 POLYZOA INFUNDIBULATA. 



wall, Couch. On Fucus siliquosus, rare in Dublin Bay, A. If. 

 Hassall. 



" This exceeding small coralline creeps on the broad-leafed horn- 

 wrack" (Flustra foliacea) ; " and sends out clusters of vesicles from 

 several parts of its creeping tube, each of which has a black spot in 

 it, like the spawn of frogs : Or rather, these look when they are mag- 

 nified, like a bunch of full ripe transparent oval-shaped grapes with 

 the stones in them." " Among many other marine substances re- 

 ceived fresh from the sea, in September 1753, this object happened 

 to present itself under my magnifying glasses ; when, to my surprise, 

 I found those grape-like bodies were a cluster of polypes, each hav- 

 ing eight claws or tentacula, very lively, extending themselves about 

 in pursuit of prey ; and upon their dying, the animals contracted 

 themselves into their vesicles, which closed at the top : What we dis- 

 cover as a spot, is only the intestines of the polype with its food in 

 it." Ellis. 



" This species climbs over fuci and corallines by means of its horny 

 tubular fibres, and produces its cells at intervals, either singly, or in 

 clusters of from three to eight. The cells are large, and in shape re- 

 semble a grain of wheat ; they are attached at one point below, and 

 free at all the rest. The aperture is terminal and closed. The po- 

 lypes have eight ciliated tentacula. When living, the cells are 

 smooth ; when dried they become wrinkled, as Ellis has figured 

 them." R. Q. Couch. 



3. V. PUSTULOSA, dicTiotomous or alternately branched ; the 

 cells clustered, unilateral. Ellis. 



PLATE LXXII. FIG. 79. 



Dichotomous tubular Coralline, Ellis Corall. 54, pi. 27, fig. 1. B. Sertularia pustu- 

 losa, Ellis and Soland. Zooph. 54. Turt. Gmel. iv. 680. Base Vers. iii. 113. 

 Stetv. Elem. ii. 444. Turt. Brit. Faun. 214. Flem. Brit. Anim. 551. Vesicularia 

 pustulosa, Thomp. Zool. Illust. 99, pi. 1, fig. 5-11. 



Hob. Parasitical on Fuci. Isle of Wight, Ellis. Cove Harbour, 

 J. V. Thompson. Youghal, Miss Ball. Belfast Bay, W. Thompson. 

 Dublin Bay, not common, A. H. Hassall. Fowey Harbour, and off 

 Goran, Cornwall, very rare, C. W. Peach. 



This " arises from the surface of marine fuci with a straight flex- 

 uose stem, to the height of two or three inches, giving off at each 

 flexure a spreading branch, which in like manner gives off secondary 

 ones, all however, both primary and secondary, lying in the same 

 plane, they are hence what botanists term distich ; each flexure of 



