372 SUPPLEMENTARY NOTES 



B. RAMULOSA, Alder and Hancock. 



" General envelope colourless, pellucid, with a few pale yellow 

 spots on the margin. Systems of individuals winding, much 

 involved ; and having a broad cream-coloured belt down the 

 centre, following the sinuations. Animals of an obscure brownish 

 yellow, with the lower half pale opaque yellow. 



" On the underside of stones, in pools, between tide-marks, at 

 Cullercoats, rare. a. h. 



" This species, which is in patches of upwards of an inch and a 

 quarter across, is at once distinguished from B. Leachii by the 

 opaque belt of cream-colour that passes along the centre of the 

 various systems of animals." — Ald. Cat. p. 113. 



AsciDiA soRDiDA, Alder and Hancock. 



" Body ovate ; of a dull semi-transparent yellowish white ; 

 nearly smooth, but coarse and with an uneven surface ; attached 

 by a narrow base. Apertures terminal and not far apart, papillose 

 or very slightly tubular, more or less echinated or tuberculated ; 

 the branchial aperture eight-cleft, the anal six-cleft, with a red 

 eye-spot at the base of each division. Outer tunic transparent, 

 vitreous and colourless, rather tough, with very little power of 

 contraction or expansion. Inner tunic about one-third less than 

 the outer one. soft yellowish, and generally very much blotted and 

 spotted with crimson, towards the upper end. Branchial sac, 

 with small even reticulations a little thickened at the intersec- 

 tions. Circle of tentacular filaments simple and slender. Length 

 about two inches ; breadth an inch and a quarter ; but very 

 variable in size. 



"This is one of the commonest Ascidice brought in on the 

 fishing-lines at Cullercoats. It is usually attached to corallines ; 

 occasionally to shells and other substances. In its young state 

 it is gregarious, and is found in clusters on Genicular ia lor iculata, 

 and sometimes inside dead bivalve shells. It is then very trans- 

 parent and hyaline ; MocUola marmorata is occasionally found im- 

 bedded in the older individuals. This species may be the Ascidia 

 primum of Macgillivray, but not of Miiller." — Ald. Cat. p. 106. 



