ARION ATER. 191 
The hypsometrical 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, Seca Fell, and other elevated localities in 
England, while in Scotland it has been collected on Ben Voirlich at 3,224 
feet, on Ben Nevis at 2,800 feet, and close to the very summit of Ben 
Tuaniond In Ireland, the same form has been met with in the Mourne 
Mountains, at an altitude of 2,796 feet on Sheve Donard, and at 2,500 feet 
on Sheve Bingian. It has also been found 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. 
Arion ater has heen recorded from Alsace, Baden, Bavaria, Brandenburg, Cassel, 
East Prussia, Franconia, Hanover, Holstein, Lauenberg, Mecklenburg, Nassau, 
Oldenburg, Osnabruck, Pomerania, Prussia, Reuss, Rhenish Prussia, Saxony, 
Schleswig, Silesia, Waldeck-Pyrmont, Westphalia, and Wurtembure. 
NETHERLANDS. 
Belgium—Reported in many varieties from the provinces of Antwerp, Brabant, 
Hainault, Liége, Luxembourg, Namur, and West Flanders. 
Holland—Cited in both its chief forms for Holland by Maitland. 
FRANCE. 
Arion ater is probably dispersed throughout France, and has been recorded for 
Corsica and the departments Ain, Aisne, Alpes Maritimes, Ariége, Aube, Ande, 
Basses Pyrénées, Cantal, Calvados. Charente Inférieure, Cote (Or, Finistére, Gard, 
Gers, Gironde, Haute Garonne, Haute Loire, Hante Marne, Hautes Pyrénées, 
Haute Savoie, Ille-et-Vilaine, Isere, Loire Inférieure, Lot-et-Garonne, Lozere, 
Maine-et-Loire, Manche, Morbihan, Moselle, Nord, Oise, Pas-de-Calais, Puy-de- 
Dome, Pyrénées-Orientales, Rhone, Savoie, Seine, Seine Inférieure, Seine-et- Marne, 
Seine-et-Oise, Somme, Vendée, and Vienne. 
ITALY. 
The var. rufa, though recorded from Piedmont, Lombardy, Emilia, Tuscany, 
and Campania, is, according to Pollonera, not found naturally in Italy, and in 
Lombardy only by acclimatization, the remaining records being based on errors of 
identification. 
AUSTRO-HUNGARY. 
Recorded for Galicia at Lemburg by Jachno and on the Tatra by Nowicki; from 
Gorz by Erjavec; from various localities in Austria by Fitzinger ; Slavik and others 
report it as oceurring, thoueh not plentifully, throughout North Bohemia; while 
von Mollendorft records it from Maglaj, in the Bosnathal, Bosnia. 
SPAIN AND PORTUGAL. 
Spain—Avion ater has been recorded from Aragon, Asturias, Catalonia, Castile, 
Galicia, Huesca, and Navarre, all in the north of Spain. 
Portugal—Reported by Simroth from Oporto, Caldas do Gerez in Minho, and 
Coimbra in Beira; and from Cintra, and Serra da Arrabida in Estramadura by 
Nobre. As A. sulcatus it is recorded by Morelet from the northern provinces, and 
as being especially common about Oporto. 
SCANDINAVIA. 
Norway—Comimon about Christiania, Christiansand, Bergen, and Trondhjem, 
extending to West Finmark, to Gréno in Nordland, and to Tromsdalen at 69° 50’ 
in Tromso. 
Sweden—Restricted to the southern extremity, but extending as far north as 
Westmanland, 60° north lat. ; common at Ronneby, in Blekinge ; somewhat rare at 
If6. in Seania, and present on the isles of Gotland and Oel: und. 
Denmark—Common in Denmark (Westerlund, Syn. Moll. Scand., 1897, p. 39). 
Recorded by Von Martens for South Iceland, and by Collinge for the Faroes. 
