XXXIII. 



NOTE ON THE GEOGEAPHICAL DISTEIBUTION 

 OF UMAX AGRESTIS, ARION EORTENSIS, 

 AND FASCIOLA HEP A TIC A. 



That some not inconsiderable confusion exists as to the question 



of the existence of Arion ater and Limax agrestis in Greenland, will 



be seen from the following quotation, to be found as hereinafter 



specified ('A Manual of the Natural History, Geology, and Physics 



of Greenland, together with Instructions for the use of the Arctic 



Expedition.' 1875. London): — 



(P. 124.) 'Mollusca Groenlandica : 



Classis i. ANDROGYNA, Morch. 

 Ordo i. Geophila, F6r. 



* I. Arion fuscuSfMixU.. Probably introduced. L. agrestis, 

 L., according to Wormskiold. 

 The species marked with an * are doubtful inhabitants of Greenland.* 



Prefixed to the list whence the above passage is taken is a note 

 to the effect that the list is the ' Prodromus Faunae Molluscorum 

 Groenlandiae (in Rink's ^ Gronland/ &c., 1857, pp. 75-100). By 

 Dr. O. A. L. Morch. Revised and augmented by Dr. O. A. L. Morch, 

 University Museum, Copenhagen. April, 1875.' 



On referring, however, to the Prodromus itself, as published in 

 Danish in 1 857^ I find the entry which concerns us stands simply 

 thus :— 



'Mollusca Qronlandica : 



Order i. Geophila. 

 Gen. i. Limax, L. 

 *i. L. agrestis, L. (ifolge Wormskjold). 

 * Betigner at Artens Forekomst paa Gronland ikke er sikker.' 



That is to say, that the line in the entry given in the Manual of 

 1875 — * "^ Ario?i fuscus y Mull. Probably introduced ' — is altogether 

 something fresh and new ; whilst the asterisk, denoting that the 



