240 TETHYDH. BOTRYLLIDZ. 
8. ASCIDIA MINUTA. 
Ascidia minuta, Montagu MSS. 
The integument reddish, subcylindric, its aperture undulated. 
Height and breadth five-eighths of an inch. 
Inhabits the seas on the western coasts of Devon very rarely : 
it adheres to shells. 
9, ASCIDIA VENOSA. 
Ascidia venosa, Miill. Zool. Dan. ii. t. xxv. f. 1-3; Gmel. 
Syst. Nat. 3124. 
The integument elongate-oval, purplish brown ; its apertures 
acutely emarginated. 
Inhabits the coast of England, on shells. 
10. AsScIDIA ASPERSA. 
Ascidia aspersa, Miill. Zool. Dan. ui. t. Ixv. f. 2; Gmel. Syst. 
Nat. 3125. 
The integument ovate, greenish yellow, subhyaline ; its aper- 
tures acutely emarginated. Height one inch and a quarter ; 
breadth nearly half an inch. 
Inhabits the European seas ; is rather rare. 
11. ASCIDIA LINEATA. 
Ascidia lineata, Montagu MSS. 
The integument cylindric, orange, with four white lines ; 
the apertures undulated. Height one inch and a quarter ; 
breadth seven-eighths of an inch. 
Inhabits the Scottish sea on the shores of Arran, adhering 
to Fuci, where I found it plentifully. 
FAMILY II. BOTRYLLID. 
The body incrusted ; the systems furnished with central 
cavities, 
