184 EUROPEAN SPECIES OF VERTIGO. 



of the outer margin, and visible outside. Peristome lipped 

 within, patulous and reflected throughout, the outer margin 

 sinuated ; columellar margin oblique, somewhat straightened ; 

 margins approaching. Length 214, diam. 1*4 mm., apert. 

 y 2 mm. high, 14 wide (Servain). 



Spain: drift debris of the Ebre at Saragossa and of the 

 Xenil at Grenada. 



Vertigo gracllsiana SERVAIN, Etude sur les Moll. rec. en 

 Espagne et en Portugal, 1880, p. 124. 



How this differs from V. moidinsiana has not been made 

 clear. 



57. VERTIGO AFRICA Bourguignat. PI. 16, fig. 14. 



Shell rimate, small, globose-oblong, obtuse, shining, sub- 

 pellucid, fulvous-corneous, under the lens very sharply sub- 

 striatulate. Spire tapering, obtuse, apex smooth, minute, 

 obtuse; whorls 6, convex, regularly increasing, separated by 

 an impressed suture, the last slightly larger, tapering, the 

 base compressed, anteriorly ascending very little. Aperture 

 slightly oblique, semioblong, 4-plicate : 1 parietal, 1 columellar 

 and 2 palatal, of which the lower is more immersed. Peris- 

 tome acute, with a whitish thickening within, expanded, es- 

 pecially at the base, externally encircled by a w y hitish lip 

 [crest] ; outer margin sinuous, arcuate in front and forming 

 a sulcus externally at the periphery ; the margins joined by a 

 scarcely visible callous. Length 3^4, diam. 2 mm. (Bgt.). 



Algeria: Alluvium of the Oued Isser, near Algiers, Let- 

 ourneux. 



Vertigo aprica BGT., Malac. de 1'Algerie ii, 1864, p. 101, 

 pi. 6, f. 36-38. 



58. VERTIGO CODIA Bourguignat. PI. 16, fig. 12. 



Shell minute, perforate, globuloid, ventricose, glossy, sub- 

 pellucid, smooth, corneous. Spire obtusely tapering, the apex 

 paler, obtuse. Whorls 5^ to 6, rapidly increasing, separated 

 by a deep suture, the penult longest, inflated, rotund; the 

 last tapering, compressed at the base, very little ascending 

 in front. Aperture slightly oblique, lunate, trigonal, nar- 



