53 



syd-Tyskland, på Wallis och Savoiens alper ännu vid 2000 meters 

 höjd, i Pieinont vid 2100 meter, i Schweitz i Auvergne och Frank- 

 rikes norra provinser samt på Pyrenéerna vid Bagnére de Luchon. 



Anm. I British Conchology I. p. 169, vid Zonites excavata Béan, 

 säger J. GwYN Jeffreys: "This species has been considered peculiar to 

 Great Britain, and to be the only land-shell which does not inhabit 

 any other part of the world; but I have reason to believe that the gree- 

 nish-white variety is the Helix vitrina of Férussac, as well as the H. 

 viridula of Menke, H. petronella of Charpentier, and probably also the 

 H. clara of Held. In the "Malakozoologische Blätter" for 1858 will be 

 found a critical dissertation by von Wallenberg on the Helix viridula of 

 Menke compared with Z. purus, in which the author showed that these 

 were quite different species; and I can answer for the identity of Z. ex- 

 cavatus var. vitrina (or viridula) with the H. petronella of Charpentier, 

 having found specimens of the latter on the Gorner glacier in Switzer- 

 land at a heigt of about 7000 feet above the sea-level, and afterwards 

 compared them with the types in Charpentier's collection at Devens while 

 I was on a visit to that eminent naturalist. In a letter which is now 

 before me from the late M. Charpentier, dated 28th August, 1854, he 

 says the H. vitrina of Férussac (but not that of Wagner, which is a 

 Brazilian species) is identical with his own H. petronella, and that it is 

 very difierent fi-om H. radiatula, with which it has only a slight relation 

 in respect of the strife." Mot denna identifiering af Z. excavata Béan 

 och Z. petronella Charp. måste jag på grund af flera af M. Jeffreys god- 

 hetsfuUt meddelade exemplar af den förra och dessas stora olikhet med 

 de många hundra skandinaviska exemplar jag har af den sednare, på det 

 bestämdaste opponera. Dessa två snäckor äro i min tanke mycket väl 

 skilda arter och utmärker sig Z. excavata genom mycket vidare nafvel, 

 mycket långsammare tilltagande vindningar, en vindning mera, den ytter- 

 sta trindare och betydligt smalare, mera rundad mynning, skalets horn- 

 bruna färg och finare striering m. m. 



* Testa sutura profunda, immarginata. 

 Skalet med djup, icke krusad, söm. 



6. Zuiiites pura (ålder). 



Testa umhilicata, depressa, cinereo-alha, vix nitidula, con- 

 fertim sed subfilissinie transversim striafa, stth lente etiam striis 

 spiralihus paraUclis ornata; spira convexa; an fr. 4, celeriter ac- 

 crcscentes, tdfimtfs deprcssus; iimljilicus phis tnimis effnsifs; a- 

 pertura Inmtlato-rotnndata. Änimal alhidtmi , lineis duahus 

 colli superne nigris. Testa animale foeia anfractihus 3 primis. 

 obscure fulvis. Diam. 3 — 4, alt. 2 mm. 



