Notes on certain Species 131 



\Vnodfonl in Northamptonshire (where, however, it is sup- 

 posed to have been introduced), is its most northerly record in 

 these islands. It is not a thriving inhabitant, and attempts 

 to plant a colony at Madingley failed 1 ." 



CochUcopa lubricd. The writer is indebted to the Rev. 

 A. H. Cooke for an account of the appearance in 1878 of 

 numerous well- developed examples of this species in the inter- 

 stices of the paving stones of the footway between King's 

 Parade and the University Library, in which unlikely situation 

 they were pointed out to him by Mr F. J. H. Jenkinson, 

 University Librarian. 



Vertigo moulinsiana was discovered in Wicken Fen in 1897 

 by Mr J. R. Le B. Tomlin and has been found subsequently 

 by other searchers at the same place. As a post- tertiary form 

 it occurs in the Barnwell and Grantchester Gravels as well as 

 in other parts of England. Besides the Wicken record of this 

 species in the living state Hitchin and Broxbourne in Hertford- 

 shire, Eastleigh in Hampshire, Morden in Dorsetshire, and 

 West Galway are the only places in which it is known alive in 

 the British Isles. At Wicken it is found on the tall grasses 

 and other plants in summer and autumn, and Mr R. Standen 2 

 considers that the animal hibernates in hollows of the dead 

 stems. He also calls attention to the suggestion by Jeffreys 3 

 made many years ago that this species would very likely be 

 found still existing in the fen-land. V. antivertigo also occurs 

 at Wicken. 



Anodonta cygnaea. The specimen from the Cam at Cam- 

 bridge in the University Museum of Zoology is the probable 

 variety anatina, established by Linnaeus as a distinct species 

 and as such regarded by many subsequent authors. The type 

 form also occurs in the neighbourhood of Cambridge, but it is 

 uncertain which is the commoner. 



1 Article " Molluscs " in Victoria County Histories, Vol. Cambridge- 

 shire, by B. B. Woodward and H. H. Bsindley. 



2 Journ. Conch., ix., 1898, p. 217. 



3 British Conchology, 1862, i., p. 256. 



92 



