woodward: list of British non-marine mollusca. 361 



Pupilla by the adoption of Risso's name for the genus becomes a 

 synonym iox Jamitiia [s.s.]. 



Whether the species of Vertigo from Ireland just identified as V. heldi 

 is really that species I am more than doubtful; it is, however, quite 

 distinct from all the other British species. 



Balea and Clausilia (all the species) are inextricably mixed up by 

 DaCosta under his Strovibiformis perversus which can consequently be 

 disregarded. I consider that these two genera may with advantage 

 be placed in a separate family Clausiliidse. 



Clatisilia. — The arrangement followed is that of Boettger.^ 

 Clausilia rolphii. — The full history of the name is : — 

 C. rolphii 'LQa.ch. — "Synopsis Moll. Gt. Brit," p. 119. 



[Proofs only, privately circulated, 1820]. 

 C. rolphii Leach. — Fdrussac,y"^«r«. Fhys., vol. 90 (April, 1820), 



p. 301. [nom. nud.\ 



C. {Iphigenia^ rolphii. — Gray, Med. Repos., vol. 15 (182 1), p. 239. 



\fiom. nud.\ 

 C. rolphii Mihi. — Gray, Attn. Phil., vol. 25 (1825), p. 413. 



[nom. nud.\ 

 C. rolphii Leach. — Turton's " Manual Shells Brit. Is." ( 1 83 1 ), p . 7 r , 



as a synonym of C. plicatula [which it is not]. 

 C. rolphii IjQdiCh. — Gray's ed. of Turton (1840), p. 215, 

 Succinea, variations endless. — There seem to be only three fairly 

 satisfactory species, but this group sadly wants a competent biologist 

 to take it up and investigate it from the anatomical standpoint. 



Alexia was first proposed by Leach in his unpublished " Cat. Brit. 

 Moll.," and was not cited in literature till Gray used it in 1847; niean- 

 time Stephens in 1835 had applied it to a genus of Coleoptera. 

 Unfortunately no other name is available, unless Gray's Phytia, used 

 in 182 1 by error for Pythia, be adopted; both Adams and Jeffreys 

 quote it, apparently unaware that it was a Grayism. 



Phytia myosotis (Drap.) 1801: P. denticulata (Mont.) 1803, where- 

 fore the former must stand as the name of the species and the latter 

 for the variety. 



Leuconia is a synonym, as Gray himself admits in 1847, ^r Ovatella 

 of Bivona. 



Ancylus, — Linne recognised only one species — lacustris; but his 

 description is applicable to both our forms and although the figures 

 cited by Linne are rather indicative of the form we now know as 

 fluviatilis, Miiller as the first authority to separate the two was within 

 his right, as we now understand it, in selecting which he choose to 

 bear the original name and his determination need not therefore 

 be departed from. 



J " Clausilien Smdien," 



