32* Mr. C. A. Lesueur on several new Species o/" Ascidia. 



length of the tubes, and projects a short distance beyond the 

 apertures ; colour white ; surface glabrous. — I have seen the 

 proboscis only of this animal. It was drawn up from the bot- 

 tom of an estuary on the coast of Georgia, by the iluke of an 

 anchor, imbedded in mud and fragments of shells. It was 

 communicated to me by Mr. Say, as one of the interesting 

 objects collected by Messrs. Maclure, Ord, Say and Peale, 

 on their voyage to Florida, and now forms part of the collec- 

 tion of the Academy. 



10. A. lobifera. Body sessile, subglobular, with approxi- 

 mate, unequal apertures, concealed in the midst of many ir- 

 regular fleshy lobes. — This species, which I have seen only in 

 the preservative liquor, was contracted, and appeared to me 

 to have been somewhat proportionably longer in the living 

 state. It seems to have been attached to a sand-stone. — The 

 distinguishing peculiarity of this species, is the thick, fleshy 

 and irregular lobes which defend the apertures. I think it 

 probable that the apertures were capable of being elevated at 

 the will of the animal, above the lobes which protect them 

 when at rest. The colour in its present state is a dull black, 

 and the surface is wrinkled. — Transverse diameter, one inch 

 and a half, height also one inch and a half. 



List of additional new Species observed chiefly in the Pacific 

 Ocean, during a Voyage of Discovery to Terra Australis; 

 from the Manuscripts and. Drawings of Peron and Lesueur. 



1 Ascidia marginella, Decres', King's and Josephine's islands, 



in New Holland. 



2 vcrmiculata, King's and Decres' islands. 



3 anatifoidea, Isle of-Frarjrce. 

 t confederata, King's island. 



5 trinenla, bottom of Gcographe bay, Leuwin's land. 



6 fragum, Elephant bay, King's and Decres' islands. 



7 truncata, Bass' strait. 



8 rapuliformis, Endracht's land. 



9 gigantea, Bougainville's bay, Decres' island. 



10 lithopoda, Decres' island. 



1 1 rhinophora, Endracht's land. 



12 rosea, Bougainville's bay, Decres' island. 



13 alba, Bougainville's bay. 



1 1 barbata, coast of Nice, Europe. 



15 p>ilosa, Isle of France. 



16 fasciata, do. 



1 7 radiata, coast of Havre, Europe. 



IK diaphana, King's island. [islands. 



19 phyllostoma, King's, Decres' and Josephine's 



20 Ascidia 



