ARION ATKR. 191 



The liypsometrical distribution is interesting, and shows a marked degree 

 of correlation between the wholly jet-black variety aterrima and a lofty 

 abode, as this variety is exclusively found, or is the most prevalent form, on 

 the summit of Coniston Old Man, Sea Fell, and other elevated localities in 

 England, while in Scotland it has been collected on Ben Voirhch at 3,224 

 feet, on Ben Nevis at 2,800 feet, and close to the very summit of Ben 

 Lomond. In Ireland, the same form has been met with in the Mourne 

 Mountains, at an altitude of 2,796 feet on Slieve Donard, and at 2,500 feet 

 on Slieve Bingian. It has also been fonnd on certain elevated stations in 

 Donegal and Kerry. All the records tend to show the sensitiveness of the 

 dermal pigmentation and its responsiveness to external influences. 



GERMANY. 

 Avion riti'}- has been recorded from Alsace, Baden, Bavaria, Brandenburg, Cassel, 

 East Prussia, Franconia, Hanover, Holstein, Lauenberg, SlecUlenbnrg, Nassau, 

 Oldenburg, Osnabruck, Pomerania, Prussia, Renss, Hbenish Prussia, Sa.xony, 

 Sclileswig, Silesia, Waldeck-Pyrniont, Westphalia, and Wurteniburg. 



NETHERLANDS. 

 Belgium— Reported in many varieties from the province.s of Antwerp, Brabant, 

 Hainault, Li^ge, Lu.\embi)urg, Namnr, and West Flanders. 



Holland — Cited in both its chief forms for Holland by Maitland. 



FRANCE. 

 Avion ater is probal)ly dispersed throughout France, and lias been recorded for 

 Corsica and the departments Ain, Aisne, Alpes Maritiiiies, Ari^ge, Aube, Aude, 

 Basses Pyrenees, Cantal, Calvados. Charente Inferieure, C6te d'Or, Finistere, (iard, 

 Gers, Gironde, Haute (Jaronne, Haute Loire, Haute Marne, Hautes Pyrenees, 

 Haute Savoie, Ille-et-Yilaine, Lsere, Loire Inf(5i'ieure, J<ot-et-Caronne, Lozere, 

 Maine-et-Loire, Manche, Morbihan, Moselle, Nord, Oise, J'as-de-Calais, Puy-de- 

 Dome, Pyrenees-Orientales, Rhone, Savoie, Seine, Seine Inf6rieure, Seine-etMarne, 

 Seine-et-Oise, Somme, Vendue, and Vienne. 



ITALY. 



The var. rufa, thougli recorded from Piedmont, Lombanly, Emilia, Tuscany, 

 and Campania, is, according to PoUonera, not found naturally in Italy, and in 

 Lombanly oidy by acclimatization, the remaining records being based on errors of 

 identification. 



A USTRO-HUXGARY. 



Recorded for Galicia at Lcmburg by Jaclino and on tlic Tatra by Nowicki; from 

 (iorz by Erjavec; from various localities in Austria by Fitzinger ; Slavik and others 

 report it as occurring, though not plentifully, throughout North Bohemia; while 

 von MiiUendoitt records it from Maglaj, in the Bosnathal, Bosnia. 



SPAIN AND PORTUGAL. 



Spain — Avion atev has been recorded from Aragon, Asturias, Catalonia, Castile, 

 Galicia, Hiiesca, and Navarre, all in the north of Spain. 



Portugal — Reported by Simroth from (Jporto, Caldas do (ierez in Minho, and 

 Coimbra in Beira ; and from Cintra, and Serra da Arrabida in Estramadura by 

 Nobi-e. As A. sulcahis it is recorded by Morelet from the northei-n provinces, and 

 as being especially common about Oporto. 



SCANDINAVIA. 



Norway — Common about Christiania, Christiansand, Bergen, and Trondlijem, 

 extending to West Finmark, to Grono in Nordland, and to Tromsilalen at 69° 50' 

 in Tromsii. 



Svyeden-^Restricted to the southern extremity, but extending as far north as 

 Westmanland, 60° north lat. ; common at Ronneby, in Blekinge ; somewhat rare at 

 Tfo, in Scania, and present on the isles of Gotland and Oeland. 



Denmark — Common in Denmark (Westerlund, Syn. Moll. Scand., 1897, p. 39). 



Recorded by Von Martens for South Iceland, and by Collinge for the Faroes. 



