GEOMALACUS. 129 



two slugs {Limax cinctus and L.fuscus) as having longi- 

 tudinal stripes; and although it is most probable that 

 one or both of them may be identical with the present 

 species, the name given by Ferussac has been adopted 

 to prevent confusion. 



Genus II. GEOMA'LACUS f. PL V. f. 3. 



Body resembling that of Arion, but more extensUo and 

 keeled on the back, besides having the reproductive orifice 

 placed near the base of the right lower tentacle, in which 

 respect it differs both from that genus and Limax. 



Shell unguiform, imbedded in the shield. 



This genus, of which only one species is known, appears 

 to be intermediate between Arion and Limax. I suspect 

 that the Limax anguiformis of Morelet (Moll. Port. p. 36, 

 pi. iii. f. 1) also belongs to the present genus, if indeed 

 it is not the same species as ours. 



Geomalacus maculo'sus J, AUman. 



G. macuhsus, Allm. in Ann. N. H., new series, xvii. p. 297, pi. 9 ; F. & H. 

 iv. p. 12, pi. F. F. F'"^. f. 5. 



No detailed account of this curious slug has been 

 published ; but it is described to be an exceedingly beau- 

 tiful animal, measuring, when creeping about, two inches 

 in length ; the colour of the shield and upper part of the 

 body is black, elegantly spotted w ith yellow ; the under 

 surface of the foot light yellow, and divided into three 

 nearly equal bands; the edge of the foot brown, with 

 transverse sulci. A white-spotted variety also occurred. 

 It can elongate itself, so as to assume the appearance of 

 a worm and thus enter exceedingly small apertures. It 

 was discovered by an active and indefatigable Irish 

 naturalist, Mr. William Andrews of Dublin, during the 



t Earth-mollusk. X Spotted. 



G 5 



