240 . ARION. 



A. CAMERANI, Lessona. PI. 58, fig. 42. 



Larger than the preceding species, subrugose ; shield moderate, 

 not gibbose, very finely granulose ; back yellowish, with a 

 nebulose blackish zone on either flank ; margin yellowish white, 

 transversely irregularly lineolate with brown ; tentacles black. 



Length (in alcohol), 25 mill. 



Piedmont. 

 A. MORELETI, Hesse. PL 57, figs. 24, 25. 



Yellowish horn, with a dusky irregular band on either side 

 the middle, and a lateral one on the sides ; shield flatly rounded 

 behind; sole unicolored. Internal shell -plate small, solid, 

 irregular in form. Length, 40 mill. 



Tangiers. 



Allied to A. fuscus, but distinguished by the position of the 

 genital opening, anteriorly on the neck near the right tentacle. 



Unidentified or Unfigured Species of Arion. 

 A. FOLIOLATUS, Gould. PL 58, fig. 43. 



Color reddish fawn, coarsely obliquely reticulated with slate- 

 colored lines forming areohe ; mantle concentrically mottled 

 with slate-color, border of foot obliquely lineated ; mantle very 

 long, smooth, the small respiratory orifice a little in front of the 

 middle of the right margin ; e3 7 e-peduncles small and short. 



Length, 85 mill. 



Discovery Harbor, Puget Sound. 



Still unknown, except by the original figure and description, 

 published over thirty years ago. 



A. FALLAX, Sterki. Switzerland. 



A. AUSTENIANUS, Nevill (undescribed). Mentpne. 



A. SOURBIENI, Fagot. France. 



A. ORESKECUS, A. PALADILHIANUS, Mabille. France. 



A. MABILLEI, Baudon. France. 



Described as a Geomalacus, but subsequently ascertained to 

 be a young Arion. The specific name has been preoccupied in 

 Arion by Bourguignat. 



A. AGGERICOLA, Mabille. France. 



A. LUSITANICUS, Mabille (A. rufus, pars, Morelet). Portugal. 

 A. RUBIGINOSUS, Baudon. France. 



