WCP2152

[1]

6^th Sept^r 1879

My dear Sir

I have just returned from Norway & find your letter¹ of the 22^nd ult^o.

I do not consider any land or freshwater mollusca peculiar to the British Isles.

As to the species mentioned by Mr Tate (according to your letter, for I have not seen his book²) I would remark as follows.

"Cyclas" (Sphaerium) pisidirides is in my opinion a variety of S. corneum. Vide "British Conchology",³ I. p. 6 IV,150.

Geomalacus maculosus probably Lusitanian, as Limax anguiformis of Morelet B. C. I. 130; France, as G. Andrewsii of Mabille, V 155.

[2]

"Helicella" (Zonites) excavatus [Helix excavatus]. Lapland, Finland, Germany, & Switzerland. B. C. I. 169.

Limnaea insolata. Perhaps a monstrous & local variety of L. glutinosa or of that polymorphous species L. peregra, of which latter species I have described 14 varieties B. C. I. 105,106,108. The fact of its present isolation makes me suspicious that this so-called species is not distinct, because all our other species of freshwater mollusca have a very extensive and almost world-wide range.

Believe me | yours very truly | J. Gwyn Jeffreys⁴ [signature]

Alfred R. Wallace Seq. F.R.S.