LOCALLY INTRODUCED SPECIES. 463. 



SPURIOUS AND DOUBTFUL SPECIES OF AKION. 



Arion {Lochea) empiricorum is quoted, without authority or description, from the West- 

 ern States by Grateloup (Distr. Geogr. de la Famille des Limaciens). 

 Arion foUolutus, Gould (Terr. Moll., Vol. iii, pi. Ixvi, fig. 2). 



Fig. 503. 



Arion foliolaUis. 



Color a redd'sh-fawu, coaiNely and ohliqnely Teticulattd with flate-co.'nrcd L.iis, 

 forming areol?B, -which are indented at, the sides, when viewed by a magnifier, so as 

 to resemble leaflets ; the mantle is concentrically mottled with slate-color, and th« 

 projecting border of the foot is also obliquely lineated. The body is rather depressed, 

 nearly uniform throughout, and somewhat truncated at the tip, exhibiting a con- 

 spicuous pit, which was probably occupied, by a mucus gland. The mantle is very 

 long, smooth, and has the respiratory orifice very small, situated a little in front of 

 the middle. The eye-peduncles are small and short. Length, 8.5™"'. 



Arion foliolatus, Gould, Moll. U. S. Exped., 2, fig. 2, a, i (1852).— Binney, Terr. Moll, 

 ii, 30, pi. Ixvi, fig. 2 (I85I).— W. G. Binney, Terr. Moll., iv, 6; copied als* 

 by Tryon and W. G. Binney, L. & Fr.-W. Sh., i, 377. 

 Jaw? 



Lingual membrane ? 



Found at Discovery Harbor, Puget Sound. 



This species is still unknown otherwise than by the original description and figure. 

 Arion Andersoni (see p. 103, foot-note, and pp. 103, 107). 



FRUTICICOLA, Held. 



Animal lieliciform ; mantle subcentral ; other characters as in Pa- 

 tula. 



Shell umbilicated or perforated, depressed-globose, sometimes pilose; 

 whorls 5-7, rather convex ; aperture broadly lunate or lunate-rounded, 

 peristome acute, veiy biiefly expanded, labiate within, its basal mar- 

 gin reflexed. 



A European genus, of which two species have been introduced within 

 our limits by commerce. 



The two specie.s of this subgenus found within our limits, rufescens 

 and Ms2)ida, are purely local, having been introduced by commerce at 

 Quebec and Halifax, respectively. I have not had an fig.504. 

 opportunity of examining the latter. The jaw of the ({jJUUTiX 

 subgenus is described as arcuate, with blunt ends; an- Ja.w of F.hispida. 

 terior surface with broad, crowded ribs (see figure of that of hispida 

 copied from Moquin-Tandon). Lehmann {I. c, Plate XII, Fig. 57) figure* 



