on the Natural Group.of Tunicata. 535 
Neither is it the Ascidia pedunculata of Lamarck, which is the 
Ascidia clavata of Shaw's Zoological Miscellany, the Vorticella 
Bolteni of Linnzus in the Mantissa Plantarum, and the Boltenia 
fusiformis of Savigny. ‘This last animal, however, as Savigny 
suspected, comes much nearer than the A. globifera of Lamarck 
to the Ascidia clavata of Otho Fabricius, which, as I before 
said, is the Ascidia globifera of Captain Sabine, and one of the 
animals Mr. Griffiths has brought from Winter Island. It thus 
appears that considerable confusion has arisen in the applica- 
tion of the trivial names pedunculata, clavata, and globifera ; 
and I shall therefore offer the following synopsis of the only 
three species of Boltenia which are yet satisfactorily known to 
exist, and which are all peculiar to the Arctic seas. 
Spec. 1. -BoLTENIA OVIFERA. 
B. murina scabra vel potius hirsuta, corpore ovato, orificiis vix 
prominentibus, pedunculo sublaterali. 
Boltenia ovifera. Sav. Mem. vol. i. p. 140. tab. 1. fig. 1. 
Ascidia globifera. Lamarck, Anim. sans Vert. vol. iii. p. 127. 
pedunculata. Shaw, Zool. Miscell. vol. vii. tab. 239. 
Druguiéres, Enc. Meth. no. 12. tab. 63. fig. 12. 13. 
Vorticella ovifera. Linn. Syst. Nat. ed. 13. p. 1319. 14. 
Animal-Planta. Edwards, tab. 356. 
Priapus pedunculo filiformi corpore ovato Alex. Russel in Phil. 
— Trans. vol. lii. p. 556. tab. xvii. (figuris malis). 
Animal aquatique. Bigot de Morogues,in Mém. Etrang.de l Acad. 
des Scien. de Paris, tom. ii. p. 145. cum tabulá pessimá? 
Spec. 2. BoLTENIA FUSIFORMIS. 
B. obscure rufa vix scabra, corpore elongato-ovato, orificiis pro- 
minentibus, pedunculo terminali. 
Boltenia fusiformis. Sav. Mem. vol. i. p. 141. 
Ascidia pedunculata. Lam. Anim. sans Vert. vol. ii. p. 127. 
Ascidia 
