LINNEAN SPECIES OF BRITISH NON-MARINE MOLLUSCA. 207 



Hanley the Linnean name is only quoted as "probably" a synonym for 

 Miiller's H. acuta. Linne's description, lie unfortunately quotes no figure, 

 leaves one in doubt whether his specimen may not have been one of the 

 smaller, closely allied species such as ventricosa, for he describes it as 

 " Hordei semine paulo major." 



Miiller makes no allusion to Linne's species, and we consider that in all 

 probability the specimens of aeutus now in the Linnean collection had been 

 received from Miiller, and that Linne's name owing to its uncertainty must 

 be allowed to lapse. 



Hygrojiia (Helix, L.) hispida (1). 



The specimen in the Linnean collection that corresponds with the descrip- 

 tion is, as Hanley points out (p. 368), identical with the H. concinna of 

 Jeffreys. 



It now forms one item of the little packet marked " No. 40 " of those we 

 believe Miiller sent to Linne. It may have become enclosed in the packet 

 by error, for Taylor (Monograph, iii. 1916, p. 17) states that though he saw 

 it in the collection thirty years before, he, failed to find it when he looked in 

 company with Mr. Roebuck in 1914, and Hanley does not mention its 

 enclosure in paper. 



Whether this particular specimen be a Linnean type or not there seems 

 no reason for displacing the name which so many authorities from Miiller 

 onwards have attached to the form that now bears it. 



*Helicigona (Helix, L.) lapicida (4). 



The identity of this species does not seem ever to have been called in 

 question. 



Arianta (Helix, L.) arbustorum (7). 



The interpretation of this species also has met with universal acceptance. 

 It may be noted in passing that the reference given in the 10th and 12th 

 editions of the ' Systema ' to " List. . . . conch, i. n. 52'" is wrong, no such 

 number existing in that work : it is corrected by Gmeliu in his edition to 

 "53,"' which is correct. The further reference to " Argenv. conch, t. 32. 

 f. 8" is quite wrong, the figure in question depicting //. nempralis : this 

 citation is rightly omitted by Gmclin. 



Helix grisea. 



Although Hanley (p. 378) found the box in the Linnean cabinet so marked 

 to be filled with examples of Helix aspersa, Mull., he does not venture to 

 advocate the adoption of the name for Midler's species, although Uillwvn 

 (Cat. ii. p. 943) does. Turton in his translation of Gmelin's edition of the 

 ' Systema' (vol. iv. p. 530) says of <jrisea that it "resembles II. pomulia." 



16* 



