PEOF. W. A. HEllDMAN Olf BEITTSH TUXICATA. 435 



= Forhesella tessellata (Forb.). 



In vol. i. p. 26 et seg. 

 Cynthia tessellata, Forb 

 C. limacina, Forb. 



C morus, Forb. = C. morus, Forb. 



C. rustica, Linn. = (?) Polycarpa gJomerata (Aid.). 



C. grosstdaria, van Ben. = Styelopsis grossularia (v. Ben.). 



O. ampulla, Brug. = Polycarpa comata (Aid.). 



G. mammillaris, Pall. ^Requires further investigation. 



C. aggregata, Eath. =Stgela aggregata (B,ath.). 



Pelonaia glabra, F. & G. 1 =Felonaia corrugata, Forbes & 



P. corrugata, F. & Gr. J Groodsir. 



Supplementary* (in vol. ii. p. 372 et seq.). 



Ascidia sordida, A. & H. =Ascidiella virginea (0. F. M.). 



A. albida, A. & H, =A. scahra (0. F. M.). 



A. depressa, A. & H. = Ascidia depressa (Aid.). 



A. elliptlca, A. & H. = ? ^. scahra (0. F. M.). 



A. pellucida, A. & H. Eequires investigation. 



Molgula arenosa, A. & H. =Eugyra glutiiians (^i'6\\.). 



Cyntliia coriacea, A. & H. ='i Folycarpa pomaria (Sav.). 



In order to complete this review of the more important pub- 

 lished lists of Britisli Ascidiidse, I shall now state what I know in 

 regard to the numerous species of Ascidia described by Messrs. 

 Alder and Hancock. Of these very short, in fact insufficient, 

 descriptions without any figures were published in the 'Annals 

 and Magazine of Natural History ' by Alder in 1863, and by 

 Alder and Hancock (after the death of the former) in 1870. 

 Unfortunately, the detailed monograph of the British Tunicata 

 which these investigators were known to be preparing for the 

 Eay Society was interrupted by the death of first one and then 

 the other of the authors ; but it was understood that Albany 

 Hancock had left a considerable amount of manuscript and 

 drawings for the plates ; and it is much to be regretted that that 

 work, incomplete though it may have been, was not published. 

 I do not know whether the MS. is still in existence. If so, it is 

 strange that no one working at Ascidians has been allowed to 

 see it, as it could scarcely fail to throw some light upon these 

 species, many of which are so imperfectly known. Fortunately, 

 Canon A. M. Norman has in his magnificent collection a number 



* This covers the species described by Alder in 1848 in Trans. TjTies. 

 Nat. Field Olub, vol. i. 



