GEOMALACUS. 245 



motive disk light yellow, divided into three nearly equal longi- 

 tudinal bands. Length, 2 inches. 



West Ireland (introduced from Spain?), Spain. 

 A rare mollusk, apparently of very local distribution. It can 

 elongate itself so as to assume the appearance of a worm, and 

 thus enter exceedingly small apertures. 



Var. ANDREWSI, Mabille. Black or very dark brown, with white 

 spots. Yar. Allmani, Heynemann, is a synonym. 



Var. Y ERKRUZENI, Heynemann. The black coloring shading into 

 gray, darker on the back, maculations white. 



G. ANGUIFORMTS, Morelet. PI. 58, fig. 44. 



Greenish brown, with a dark band on either side ; rugae thin, 

 reticulated; mantle elongate, smooth, minutely black- d o tt ed ; 

 head and tentacles bluish ; respiratory cavity anterior. 



Length, 2*5 inches. 



i Portugal. 



A somewhat doubtful species. Although the figure and de- 

 scription indicate different coloration, its identity with G. macu- 

 losus has been surmised. 



Unfigured and Spurious Species. 



G. LUSITANICUS, Silva. Portugal. 



G. VENDEIANUS, Letourneux (?= Arion, juv.). France. 



G. INTERMEDIUS, Normand (Arion flavus, Fer.) = Arion, juv. 



France. 



G. BOURGUIGNATI, Mabille (G. HIEMALIS, Baudon) = Arion, juv. 



France. 



G. PALADILHIANUS, and G. MOITESSIERIANUS, Mabille = Arion, 



juv. France. 



G. MABILLEI, Baudon. = Arion, juv. France. 



Subgenus LETOURNEUXIA, Bourg., 1866. 



The supposed absence of the mucous pore, one of the prin- 

 cipal points of distinction from Geomalacus, is probably an 

 erroneous observation made upon individuals contracted in alco- 

 hol. Fischer and others have united this group with Geomalacus 

 as a synonym. 



