SPERMODEA. 187 



lum R. Braun, in Walchner, Handbuch d. Geognosie, 2d ed., 

 1851, p. 1139 (nude name). — Helix plicatella comiculum 

 Ludwig, Geognosie u. Geogenie der Wetterau, Festschr. Wet- 

 terau. Ges. f. d. ges. Naturk. zu Hanau., 50 Jahr., 1858, p. 

 118. Upper Oligocene, Chattien: Hochheiin-Florsheim, to 

 Lower Miocene, Burdigalien : Bohemia. 



1. Spermodea lamellata (Jeffreys). PL 32, figs. 1, 2, 3. 



The shell is narrowly umbilicate, dome-shaped, thin, 

 chamois-colored, with a silky luster; compactly coiled, com- 

 posed of about 5y 2 strongly convex, slowly increasing whorls, 

 the penult widest, viewed from above, the last rounded peri- 

 pherally and at base, impressed around the circular, deep 

 umbilicus. Sculpture of narrow, subvertical, cuticular rib- 

 lets, with (about 5) microscopic striee in each interval; the 

 initial iy 2 whorls microscopically, densely pitted. The aper- 

 ture is nearly vertical, lunate; lip thin and sharp, the eolu- 

 rnellar margin dilated; lip insertions remote, a smooth area, 

 spreading forward, between them. 



Height 1.9, diam. 2.2 mm. 



Great Britain and Ireland; Sweden; Denmark and the 

 Baltic coast of Germany; diluvial deposit near Illertissen, 

 south of Ulm a. D., southern Germany. Type loc. : Scar- 

 borough, York. Usually found among dead holly or beech 

 leaves. 



Helix lamellata Jeffreys, Trans. Linn. Soc. Lond., xvi, 

 1830, p. 333; Brit. Conch., i, p. 175; iv, p. 158. — Wester- 

 luxd, Fauna, i, 1889, p. 17. — Rimmer, Quart. Journ. of 

 Conch., i, 1877, p. 265 (description of living animal). — Acan- 

 tkinula lamellata Boycott, Journ. of Conch., xv, April, 1917, 

 p. 175, figs, (genitalia). — Steenberg, Vid. Meddel. Dansk. 

 naturh. Foren. Kjobenhavn, vol. 69, 1918, p. 6, f. 3 (geni- 

 talia). — H. Watson, Proc. Malac. Soc. London, xiv, p. 17. — 

 Geyer, Xachrbl., 1915, p. 67 (occurrence in southern Ger- 

 many). 



Helix scarburgensis Turton, Manual Land and Fresh-water 

 Shells Brit. Is., 1831, p. 62, fig. 48 (Scarborough). — Ross- 

 maessler, Iconogr., ii, pt. 8, p. 37, no. 533. — Helix seminulum 

 Rossmaessler, t. c, on pi. 39, f. 533 (Kiel). 



[Helix] holosericea Miller Ms. ace. to Jeffreys, I. c, 1S30. 



