AMAROUCIUM PEOLIFEKUM. 9 



tentacular filaments (fig. 91, />).] Branchial sac with 

 about fourteen rows of stomata. Stomach plicated ; 

 post-abdomen rather long-. 



Height of masses about an inch (25 mm.). Length 

 of individuals three-tenths of an inch (8 mm.). 



FIG. 91. Branchial apertures of Amarovcium proliferum, dilated, x 

 about 50. (M. Edwards, pi. iii, f. 2 I.) a, in profile, b, face view 

 showing the tentacles. 



Hab. Under shelving rocks or stones near low 

 water-mark. 



ENGLAND. Not uncommon on the south and west 

 coasts. Torbay (Alder] [and Ilfracombe (Gosse)~\, 

 Devon. Falmouth (Alder [and Cocks']) and Polperro 

 (Laiighrin [1866]), Cornwall. Isle of Man (Alder). 



WALES. [Tenby (Gosse).~] Menai Straits, Anglesey 

 (Alder). 



IRELAND. Belfast Bay, Antrim ; [and Clew Bay, 

 Mayo] (Thompson). Birtirbuy Bay, Gal way (Barlee 

 [and Brady]). Bantry Bay, Cork (Norman). 



CHANNEL ISLANDS. Guernsey (Alder [and Norman]). 



First recon/.- -Thompson, 1843. 



The excretory orifice of this species closes when the 

 animal is dead, so as to be with difficulty recognized. 



2. Amaroucium albicans Milne Edwards. 

 (Plate LIII, figs. 4-6 ; and PL LVI, fig. 3.) 



Amaroucium albicans MILNE EDWARDS Obs. Ascidies comp. 

 [1841], p. 73, [in Mem. Acad. Sci. List, France, XVIII 

 (1842), p. 289, pi. i, f . 3 b THOMPSON in Ann. Nat. Hist. 

 (2) I (1848), p. 64]. 



