70 mUTISH TUN 1C' ATA. 



the branchial aperture ; the thorax from near that 

 aperture downwards marked with a double line of 

 opaque white, broadest above and -ending on the 

 margin of the tubular common orifice ; these lines 

 sometimes yellowish and occasionally broader and 

 confined more exclusively to the base. 



Diameter of the mass from two to three inches (50- 

 76 mm.). Lrtujth, of individuals three-quarters of a 

 line (1*2 mm.). 



Hal). On the stems of Fuci, more rarely on stones, 

 at and beyond low water-mark. [On stones, Ftd-ns 

 serratiiK, etc. (Codes).] 



ENGLAND. Devonshire and Cornwall, not uncommon 

 (Alder). [Falmouth, Cornwall (Cocks).'] 



IRELAND. Belfast Bay, Antrim (Thompson). 



CHANNEL ISLANDS. Guernsey (Alder). 



First record. Forbes & Hanley, 1848; [coll. Alder]. 



7. Botryllus badius *p. nov. 

 (Plate LII, tigs. 6-9.) 



Colony (PI. LXII, fig. 6) a thickish, semi-trans- 

 parent crust, enveloping seaweeds ; fawn-coloured, 

 with numerous white gemmae and marginal tubes. 



O O 



Individuals (PI. LXII, figs. 8 and 9) of a deep brown 

 colour variegated with darker shades of the same, 

 arranged in circular or elliptical systems of from six 

 to eighteen or twenty around a wide central orifice 

 (PL LXII, fig. 7). Branchial aperture with a white 

 rim and a white spot or streak below it ; atrial aper- 

 ture conspicuously bordered with white, and with 

 a faint interrupted white line on the upper part of 

 the body. 



Diameter of the mass an inch to an inch and a half 

 (25-o8 mm.). Length of individuals half a line 

 (1 mm.). 



Halt. Incrusting a small Fucus. 



ENGLAND. Isle of Man, dredged (Alder). 



