436 



PEOF. W. A. HEEDMAK ON BRITISH TUNIOATA. 



of specimens of Ascidiaus named by Alder or Hancock ; and he 

 has most kiadly allowed me to examine these, many of which are 

 the original types. For this and for the loan of many other 

 specimens for examination and comparison, I wish to express my 

 hearty thanks to Canon Norman. 



The following is a list, with, the modern names, of the species 

 described by Alder in 1863 * (omitting species already dealt 

 with) :— 



Ascidia pustulosa 

 Ascidia ohliq^ioa 

 Ascidia rudis 

 Ascidia plebeia 

 Ascidia aculeata 

 Ascidia pulcliella 

 Molgula socialis 

 Molgula arenosa 

 Cynthia squamulosa 

 Cynthia rosea 

 Cynthia echinata 

 Cynthia mammillaris 

 Cynthia sulcatiila 

 Cynthia granulata 

 Cynthia comata 

 Cynthia glacialis 

 Cynthia opalina ■ 



Cynthia violacea ■ 



Cynthia glomerata ■ 

 Thylacium Normani - 

 Thylacium variegatum- 

 Diazona hebridica - 

 Also nine species of 



^Ascidiella aspersa (O. P. M.). 



= A. ohliqua, Aid. 



= ? J. mentula, O. F. M. 



= A. plebeia (Aid.). 



= Ascidiella aspersa (0. F. M.). 



= Ciona intestinalis (L.), variety. 



= M. socialis, Aid. 



= Eugyra glutinans (Moll.), 



= C. squamulosa, Aid. 



= ? C. squamulosa, Aid. 



= C. echinata (L.). 



— Styela sp. ? 



— Styela sp. ? 

 = Styela sp. ? 

 = I'olycarpa comata (Aid.). 

 = Styela sp. ? 

 ■='} Styela. [Canon Norman's specimens 



are a Molgula.'] 

 = ? a Molgula. 



= Polycarpa glomerata (Aid.). 

 = T. Normani, Aid. 

 = T. variegatum. Aid. 

 = Diazona violacea, Sav. 

 Compound Ascidians. 



I shall now deal with the new species described by Hancock in 

 1870 f. Some of these species were described from specimens 

 in the collection of Canon Norman, who has, as I have stated 

 above, very kindly allowed me lately to examine the type spe- 

 cimens and take notes from them. This has enabled me to come 



* Ann. & Mag. Nat. Hist. ser. 3, vol. xi. p. 153. 



t Op. cit. ser. 4, vol. vi. p. 353, " On the Larval State of Molgula, &c." 



