34 ASCIDIADiE. 



8. A. PARALLELOGRAMMA, 0. F. MulleV. 



Zool. Dan.t. 49, f. ], 2, 3. 



Body more or less tetragonal, sub-compressed, adheriug by 

 base. Tunic smooth, glossy, pellucid, exhibiting the branchial 

 sac ornamented conspicuously with rectangular reticulating white 

 lines, and occasionally bright yellow or crimson spots. Orifices 

 terminal, rather distinct, not conspicuously ocellated. About an 

 inch and a half in length. 



"Ascidiarum pelluciditate, consistentia, colorumque splendore 

 spectatissimus." — MiJLLER. 



Attached to algse in Strangford Loch, W. Thompson, Ann. 

 Nat. Hist. vol. V. (1840) p. 94. Roundstoue Bay, Connemara, 

 W. T., R. Ball, E. F. (1840). Zetlands, (1845,) R. M'Andrew and 

 E. F. 



9. A. PRUNUM, Miiller? 



0. F. M'liller, Zool. Dan. t. 34, f. 1,2, 3. — Pirena prunum, Fleming, Brit. An. 



p. 468 ? 



Body ovate, depressed, adhering to the side. Tunic very 

 smooth, hyaline, the branchial sac shining white through the 

 tunic. Orifices sessile, or nearly so, approximate, bordered with 

 yellow, the branchial with eight red ocelli and eight tubercles in 

 the tunic around it ; the anal with six red ocelli and six sur- 

 rounding tubercles. Usually about an inch in length. 



Common on most parts of our coast, adhering to the under sur- 

 face of stones at low-water; often gregarious. Isle of Man, Bris- 

 tol Channel, west and east coast of Scotland, Zetlands, E. F. 

 Dredged in the Lochs of Strangford and Belfast, W. Thompson. 

 Northumberland, Mr. Alder, who objects to this species being 

 referred to the x>^'umim of Miiller. 



10. A. ORBICULARIS, Ml'iller. 



Zool. Dan. t. 79, f. 1,2. 



Body orbicular, depressed, adhering. Tunic hyaline, pellucid, 

 with an opaque disk, " scabrous." Orifices approximate, sessile. 

 One inch across. 



" On Zostera marina in Strangford Lough," W. Thompson, 

 Ann. Nat. Hist. vol. v. (1840) p. 94. 



