ACANTHINULA. 191 



Acanthinula stampinensis (Desli.). Helix stampinensis 

 Deshayes, Deser. Aiiim. s. Vert. Bassin Paris, ii, 1863, p. 825, 

 pi. 52, f . 16-18. — Acanthinula s., Wenz, Foss. Cat., p. 976. 

 Upper Oligocene, Chattien: Cote-St.-Martin near Etampes 

 (Seine-et-Oise). 



Acanthinula stueri (Cossm.). Helix stueri Cossmann, 

 Cat. 111. Coq. Foss. Eoe. env. Paris, v, 1892, p. 79. — Acanthi- 

 nula s., Wenz, Foss. Cat., p. 977. Helix (Acanthinula) bouryi 

 Cossm., 1889, not of de Morgan, 1885. Lower Eocene, Lute- 

 tien: Caleaire grossier, Neauphlette (Seine-et-Oise); Trye 

 (Oise) ; Middle Eocene, Bartonien: Le Guepelle (Seine-et- 

 Oise). 



Acanthinula trochulus (Sandberger). Pupa (Modicella) 

 trochulus Sandb., Land- und Siisswasserconch. Vorwelt., 1874, 

 p. 601, pi. 29, f. 25. — Acanthinula t., Wenz, Foss. Cat., p. 977. 

 Upper Miocene : Wiirttemberg, Austria, Hungary. 



Acanthinula tuchoricensis (Klika). Helix (Acanthinula) 

 t., Klika, Archiv naturw. Landesdurchforschung Bohmen, vii, 

 1891, p. 42, f. 35. — Acanthinula t., Wenz, Foss. Cat., p. 978. — 

 Lower Miocene, Burdigalien : Landscbneckenkalk, Lipen and 

 Tucborsbitz, Bobemia; Upper Miocene, Tortonien: Oppeln, 

 Silesia. 



Acanthinula aculeata (Muller). PL 32, figs. 4, 5, 6. 



Tbe sbell is umbilicate, broadly conic with very obtuse apex 

 and rounded periphery and base, thin, cinnamon-colored. 

 Whorls convex, the first 1% with sculpture of very fine, raised 

 spiral striae, the rest with narrow, oblique, retractive riblets, 

 in great part cuticular, and about 30 in number on the last 

 whorl ; above the periphery each is widened triangularly and 

 produced in a spine, causing the last two whorls to appear 

 shouldered. Surface between the riblets is finely, irregularly 

 striate and with rather indistinct, impressed spiral lines. The 

 aperture is oblique, circular except that about one-fourth of 

 the circle is excised by the preceding whorl. Periphery hav- 

 ing a cuticular expanded margin and thickened within by a 

 white callous rib. Columellar margin dilated. 



