6 BRITISH TUNICATA. 



ENGLAND. Hastings, Sussex (Boircrlxml^ [18(54]). 



IKELAND. Bantry Bay, Cork (Norma/ii). 



First record. Alder, 1803; cull. Norman, 1858. 



For a knowledge of this species we are also indebted 

 to Mr. Norman, who procured two specimens between 

 tide-marks on the south side of Bantry Bay, in 

 October, 1858. It is distinguished from P. aurnnfii!))/ 

 by the brain-like folds of the surface, as well as by 

 its smaller and more circular common orifices (PI. LT, 

 fig. 9). The character of the individuals could not 

 be satisfactorily made out. 



A Polyclinum sent to us from Hastings by Dr. 

 Bowerbank appears to belong to tin's species. The 

 Hastings specimens (PL LI, figs. 10 and 11) were 

 rather larger than those from Bnntry Bay, and not so 

 distinctly corrugated into folds over the surface. An 

 individual extracted from the mass had the thorax 

 rather more elongated than in P. aurantium; the 

 abdomen was larger, more ovate, and scarcely divided 

 from the thorax : the post-abdomen was attached by 

 a very slender peduncle, becoming fusiform below and 

 ending in an obtuse point at the base The common 

 orifices were small, circular, and verv slight! v margined. 



/ en / 



[The figures of this form so nearly resemble P. cere- 

 IriforiiK* that there can scarcely be a doubt of the 

 identity, and the above description of the individuals 

 may therefore be considered to supplement the meagre 

 one of the colony as seen in the Bantry Bay specimens.] 



Genus 15. AMAROIJCIUM* Milne Edwards, 1841. 



Amaroucium MILNE EDWARDS Obs. Ascidies com]). [1841], 

 p. 67, [in Mem. Acad. Sei. List, France, XVIII (1842), 

 p. 283] . 



Amouroucium FORBES & HAKLEY Brit. Moll. I [1848], p. 

 15 ; H. & A. ADAMS Gen. Eecent Moll. II [1858], p. 601. 



Amoercecium GOSSE Man. Marine Zool. II [1856], p. 33. 



Amoroecium WOODWARD Man. Moll. [pt. 3 (1856),] p. 343. 



* Amarcecium in Alder & Hancock's MS. 



