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Ascidia lepadiformis, Mull. — " Clavellina 

 lepadiformis, Savig'"' Flem. 

 Rare. 



Sub-gen. Pyrena. 



3. prunum. 



Ascidia prunum, Mull. — Pyrena prunum, 

 Flem. 

 Frequent. 



Sub-gen. Ciona. 



4. intestinalis. 



Ascidia intestinalis, Lin. — A. corrigata, Mull. 

 — Ciona intestinalis, Flem. 

 Rare ; from Laxey bank. 

 Sub-gen. Phallusia. 



5. mentula. 



Ascidia mentula, Mull. — Phallusia mentula, 

 Flem. 

 North coast ; not rare. 



