78 THE NAUTILUS. 



I. Limax L. replaces Arion Fer. 



LIMAX Linnseus, Syst. Nat. (10), I, p. 652, for L. ater, rufus, 

 maximus, agrestis, flavus. Lamarck, Syst. An. s. Vert. 1801, p. 

 64. L. rufus mentioned as an example. Children, Lamarck's 

 Genera of Shells, 1823, p. 99. "Type, Limax rufus [idem. 

 Linn.]." Gray, P. Z. S. 1847, p. 170. Type, L. rufus. 



ARION Ferussac, Hist. Nat. Moll. 1819, p. 53, for A. empiri- 

 corum Fe"r. (including as varieties ater and rufus L., etc.), A. 

 albus Miill., A. fuscatus Fer., A. hortensis Fe"r. 



Fe"russac's action in dividing Limax L. was perfectly proper 

 and a great advance. He created Arion for the first two Linn- 

 sean Limaces and others, and restricted Limax to Linnasus' last 

 three species. Unfortunately he did not name types for either 

 genus; so that his work was overturned by Children, in 1823, 

 who selected Linnseus' second species (an Arion') as the type of 

 Limax. This restriction of Limax to the Arions was confirmed 

 by Gray in 1847, though as often happened, he did not know 

 what he was doing. 



So far as I know, the only modern author to substitute Limax 

 for Arion was F. Jousseaume, in the Bull. Zool. Soc., France, 

 I, 1876, p. 26. He took this stand on account of the publica- 

 tion of Limacella for the maximus and agrestis groups by Brard. 



II. Eulimax Moq.-Tand. replaces Limax Auct. 

 Limax being relegated to what we have called Arion, it re- 

 mains to provide a name for what has hitherto passed as Limax. 

 The group has been named several times, and the older names 

 included both the large and small limaces. EULIMAX Moquin- 

 Tandon, Hist. Nat. Moll. France II, 1855, pp. 18, 22, origin- 

 ally proposed to distinguish Limaces from Amalias, has subse- 

 quently been restricted to the maximus group. It may be used 

 in a generic sense with Limax maximus L. as type. 



III. Limacella substituted for Agriolimax. 

 In his useful Check-list of the Slugs 1 Professor Cockerell 

 called attention to the nomenclature of the group generally 

 known as Agriolimax. He found that there were several names 



'The Conchologist, II, 1893, p. 199. 



