258 LAURIA. 



Orcula schmidti Kstr. by the smaller number of the more 

 rapidly increasing whorls, which appear relatively much 

 higher; by the palatal callus present in the typical form; the 

 narrow, crevice-like umbilicus; the last whorl rising less in 

 front, and rounded around the umbilicus, not compressed into 

 an obtuse angle such as 0. schmidti shows. It differs from 

 0. gularis and its form spoliata, which are also similar, by the 

 thicker, cylindric shell, its apex not tapering but rounded off, 

 by the more distinctly convex whorls, separated by a deeper 

 suture, the epidermal rib-striae, wider peristome, as well as by 

 the much weaker palatal callus (Sturany). 



LAURIA Gray. (This volume, p. 43.) 



Lauria cylindracea DaC. Page 47. 



By a careless oversight, the name was printed Lauria cylin- 

 drica on page 47. 



Ernst Schermer-Liibeck has given the distribution of this 

 species in Germany. In places about Kellersee and the Ratze- 

 burgerseen he found a long form with weakly developed aper- 

 tural features. In the same places the toothless form inermis 

 Westerl. lives. In the region of these north German lakes L. 

 cylindracea has almost become a real water animal, living 

 among the dripping- wet beech leaves quite in the water (Ar- 

 chiv. f. MoUuskenk. 1922, 171, 178). 



Lauria cylindracea margieri (Caziot). 



This is a short form, ball-like, with the peristome thick and 

 white. It differs from the type by the rounded, ventricose 

 form, the shortened spire and the absence of teeth in the 

 aperture. 



The form curt a West, is toothed like the type. The form 

 inermis of the same author is not also ventricose {Caziot). 



Corsica : on dry stones of a wall on the railroad near Bastia ; 

 with L. umbilicata. 



Lauria umbilicata var. margieri Caziot, Bull. Soc. Sci. Hist, 

 et Nat. de Corse, Bastia, 1903, xxii, Ann., p. 278. 



Lauria cylindracea misella (Paul.). This vol., page 53. 



