BIPAHLLARIA. TUNICATA. 1J7 



Gen. 2. BIPAPILLARIA, Lam. 



Body free, naked, oval-globular, terminated posteriorly by a 

 kind of peduncle, with two conical perforated and tentacular 

 papillae at its upper extremity ; orifices with each three seta- 

 ceous tentacula. 



B. Australia, Lam. Body whitish rose-coloured, glabrous. Inha- 

 bits West coast of New Holland. Lam. iii. 128. 



Gen. 3. ASCIDIA, Lam. 



Body oval, conical or cylindrical, sometimes claviform, contain- 

 ed in an exterior envelope, more or less coriaceous or subge- 

 latinous, fixed by a widened or pedunculated base, and termi- 

 nated above by two short, indistinct, unequal syphons, of which 

 the orifices are furnished with radiated tentacula. 



The Ascidia: live in the sea, generally on the coasts, fixed to rocks, shells, or ma- 

 rine plants. They possess little regularity of form, and are found in groups more 

 or less numerous. 



* Body sessile, short, or slightly elongated. 



A. phusca, Cuv. Body oval, smoothish ; tunic thin, semipellucid, 

 subcartilaginous ; mammillae of the aperture striated. Mem. du 

 Mus. ii. pi. 1, fig. 7, 9, and pi. 2, fig. 8. 



A. mammillaris, Pall. Body sessile, short, white, with scattered soft 

 setae ; aperture of the papillae hemispherical. Inhabits coasts of 

 England. Lam. iii. 123. 



A. rustica, Lin. Body scabrous, ferruginous; aperture flesh-colour- 

 ed. Inhabits European seas. Lam. iii. 123. 



A. conchilega, Lam. Body compressed, covered with testaceous 

 fragments; tunic white, shading to blue. Inhabits Northern 

 coasts. B. Lam. iii. 123. 



A. ampulla, Lam. Body ovate, tomentose ; orifices tubular, dotted 

 on the margin. Inhabits European seas. Lam. iii. 124. 



** Body sessile and elongated. 



A. mentula, Lam. Body ovate, compressed, hairy, brownish ; tunic 

 thick. Inhabits Northern ocean Lam. iii. 125. 



A. papillosa, Cuv. Body oval,, erect, scabrous ,* tunic coriaceous, 

 rough with small papillae. Inhabits coasts of the Adriatic sea. 

 Mem. du Mus. ii. pi. 2, fig. 1, 3. 



A. intestinalis, Lin. Body elongated, smooth, flaccid; orifices ap- 

 proximated at the apex. Inhabits seas of Europe. Cuv. Mem, 

 du Mus. ii. pi. 2. fig, 4, 7- 



*** Body pedunculated, or narrowed into a peduncle inferiorly. 



A. lepadiformis, Mull. Body clavate, hyaline ; apex subquadrangu- 

 lar ; peduncle waved. Inhabits coasts of Norway Zool. Dan. ii. 

 pi. 75, fig. F. 



A. clavata, Pall. Body elongated, pedunculated below, and thick-* 



