24 BOTRYLLIDiE. 



2. B. ALBICANS, Milne-Edwards. 



Mem. p. 304, pi, 6, fig. 2. 

 Plate A, fig. 8. 



White stars on a transparent ground. 



"On June IGth, 1846, I found tliis species attached to the 

 under side of a stone in a pool, between tide-marks, at Springvale, 

 county of Down. It was likewise attached to fuci (Fucus vesicu- 

 losus, (tc.) growing in the rock-pools, and was in much smaller 

 masses than the following species ; generally but one system of 

 individuals existed in each mass. On the small branches of fuci 

 to which it was attached, there was not room for more ; nor was 

 there, indeed, on the broadest portion of the main stem, whence 

 the leading branches of the plant issued : the latter is its favour- 

 ite position," W. Thompson, Ann. Nat. Hist. 184G, voh xviii. 

 p. 385. 



S. B. ROTiFERA, Milne-Edwards. 



Mem. Asc. Comp. p. 301, pi. 6, fig. 1 and 1", 



Mass gelatinous, yellowish ; individuals having semi-transpa- 

 rent tunics, speckled with red ; the red specks form a ring round 

 the mouth. 



" On the under side of the same stone with the last, and cover- 

 ing several square inches of its surface. I mark it with doubt, 

 on account of some little difference in colour. The ' consistence 

 gelatineuse' was hyaline rather than 'jaunfitre.' The indivi- 

 dual forms were more of a uniform red than in Edwards's figure, 

 and were each as brightly coloured as in i?. 7'ubrum, Edw., and of 

 the tint that it is represented to be. The individuals being ar- 

 ranged in a scattered manner, and not thrown into masses as in 

 B. 7'ubrum, was a striking character," W. Thompson, loc. cit. 

 " There is a species with wheel- like rays on this (Northumberland) 

 and the Cornish coast, but it is yellow without red markings, as 

 in £. rotifera" Mr. Alder in letter. 



4. B. RURRUM, Milne-Edwards. 



Mem. Asc. Comp. p. 304, pi. G, fig. 3, 3'. 



Common tunic opaque, and throughout of an intense orpiment 

 red. Systems more distinct than in the last species. 

 Common at Falmouth, Mr. Alder. 



