GEOMALACUS. 24 1 



A. NIVALIS, Koch. Tyrol. 



A. OLIVACEUS, Schmidt. Transylvania. 



A. PEGORARII, Lessona and Pollonera. Aosta, Italy. 



A. LIMACOPUS, A. CITRINUS, Westerlund. Sweden. 



A. POLLONERA, Pint. Italy. 



A. ATERRIMUS, Gray. So. Africa. 



Genus GEOMALACUS, Allman. 



Dr. D. F. Heynemann thus remarks upon the supposed French 

 species of Geomalacus : 



Through Mr. T. A. Yerkriizen of London, I received a small 

 parcel of living Geomalacus maculosus, Allman, from Ireland ; 

 and having carefully examined these, I am now enabled crit- 

 ically to investigate the statement of several French authors 

 that this genus not only occurs in France, but is there repre- 

 sented by various species. 



English authors started an hypothesis that the animals, with 

 the plants they live amongst (and which are only met with in 

 the southwest of Ireland), were of Asturian or Spanish origin. 



Although it had not been proved that Geomalacus does occur 

 on the Pyrenean peninsula until Lucas von Heyden found one 

 specimen in the Asturias, during his entomological journey in 

 Spain in 1868, and forwarded it to Germany, the above hypoth- 

 esis of British authors was nevertheless adopted in 1867, by the 

 French malacologists Bourguignat and Mabille ; and they even 

 went to the length of taking as an established fact what has been 

 proposed as a supposition only. 



Geomalacus having thus been once established as of Spanish 

 origin, its distribution must, according to the ideas of these 

 authors, have taken place by the way of France only. All at once 

 they discovered consequently in the forest of Meudon, near 

 Paris, what they wished to find, not only the traces of the 

 migratory Geomalacus, but even three new or entirely unknown 

 species, which were described by Mabille in his monograph of 

 this genus, published in the " Revue et Magasin de Zoologie," 

 1867, p. 53, as Geomalacus Bourguignati, Paladilhianus and 

 Moitesserianus. From that time new species continued ever 

 increasing, the names of which may as well be passed over in 

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