ASCIDIA. 81 



1. A. INTESTINALIS, LinnsGus. 



Ascidia intestinalis, Lin. Syst. Nat. 12th ed. (previously described by Bohadscli, 

 An. Mar. p. 132, t. x. f. 4-5) ; Cuvier, Mem. du Mus. t. ii. pi. 2, f.4-7.— 

 A. corrugata, M'uller, Zool. Dan. t. 79, f. 3^. — A. virescens, Brugiere, Enc. 

 Meth. pi. 64, f. 4-6. — Phallusia intestinalis, Savigny, Mem. pt. 2, p. 169, 

 pi. 11, f. I. — Ciona intestinalis, Fleming, Brit. An. p. 468. — Ascidia intesti- 

 nalis, Macgillivray, Mol. Aberdeen, p. 313. 



Body elongated, cylindrical; outer tunic thin, soft, gelatinous, 

 smooth, transparent, usually pale green or yellow. Orifices ter- 

 minal, placed close together on rather short tubes, usually bor- 

 dered with bright yellow: the branchial with eight lobes and 

 eight red ocelli; the anal with six. Elongated fibrous bands 

 shine through the outer tunic. 



It grows to the length of five or six inches, but commonly to 

 not more than three. It adheres to rocks, shells, fuci at various 

 depths. It is found on most parts of our coast, but is especially 

 abundant in the north. 



2. A. cANiNA, 0. F. MuUer. 



Zool. Dan. t. 55, fig. 1-6 (copied in Enc. Meth. pi. 64, f. 1-3).— Phallusia 

 canina, Savigny, M6m. pt. 2, p. 171. 



Body elongated, cylindrical, flaccid ; outer tunic stronger than 

 that of the last species, more or less tinged with red, especially 

 about the approximated, terminal, and much corrugated orifices. 

 Three to four inches in length. Adhering to fuci in from three to 

 seven fathoms water. 



Strangford Lough, W. Thompson. Clew Bay, County Mayo, 

 W. T., R. Ball, E. F. Kirkwall Bay, Orkney, J. Goodsir and E.F. 

 (1839). In the Solent, (1847,) Capt. James, R. E., and E. F. 



3. A. VENOSA, O. F. Miiller. 



Zool. Dan. t. 25. 



Body elongated, sub-cylindrical ; outer tunic sub-cartilaginous, 

 smooth, pellucid, so lineated with red vascular ramifications as to 

 appear of a red hue all over. Branchial orifice terminal, anal 

 lateral ; both sessile, tinged with red, and more or less corrugated. 

 Inner tunic crimson. Length about two inches. Usually gre- 

 garious. 



" Obtained by dredging in the loughs of Strangford and Bel- 



