14 BRITISH TUNICATA. 



southern shores and the opposite coast of France 

 where it was originally noticed by M. Milne Edwards. 

 It has considerable resemblance to A. proliferum, 

 from which it can scarcely be distinguished in old 

 spirit specimens, when the characteristic red spots are 

 obliterated. It generally occurs, however, in smaller 

 and more cylindrical masses. A good anatomical 

 character confirming its distinctness as a species is 

 found in the stomach, the surface of which is formed 

 of little star-like areolas, not being plicated as in 

 A. proliferum. 



5. Amaroucium edentulum Victor Cams. 



Amareuclum edentulwn VICTOR CARDS in Proc. Aslimol. Soc. 

 II [(1851), p. 269]. 



Colony tile-red in colour, with lighter spots from 

 the colourless apertures. Individuals arranged in 

 circular or longitudinal systems of ten to forty. 

 Branchial aperture with an even rim, the lobes being 

 united by a pellucid membrane. Thorax brown. 

 Branchial sac with fourteen transverse rows of 

 stigmata. Ahdomen pedunculated ; stomach with 

 irregular folds. Post-abdomen only as long as the 

 abdomen, of which it forms a continuation. 



Lenijth of individuals, one-sixth of an inch (4mm.). 



Hab. [? Near low water-mark.] 



ENGLAND. Scilly Isles (Gar us). 

 First record. Cams, 1850. 



Dr. Cams states that this species is nearly allied to 

 A. Nordmanni, from which it differs in the total 

 absence of free lobes around the branchial orifice. 

 The pedunculated abdomen is also peculiar. 



6. Amaroucium Nordmanni Milne Edwards. 

 (Plate LIV, fig. 4; and figs. 94 and 95 in text.) 



Amaroucium Nordmanni MILNE EDWARDS Obs. Ascidies 

 comp. [1841], p. 73, [in Mem. Acad. Sci. Inst. France, 

 XVIII (1842), p. 289,] pi. i, f. 5, and pi. iii, f. 3. 



