188 ACANTHINULA. 



Accmtliinula lamellate/, var. albina Schlesch, The Natural- 

 ist, Feb. 1921, p. 82. — Cf. Sundler, Journ. of Conch., xvii, 

 p. 155! — Acanthinula lamellata var. albida Berthold Sund- 

 ler, Journ. of Conch., xvi, 1922, p. 285. — R. A. Phillips, 

 Journ. of Conch., xvii, 1923, p. 34 (Maryborough, Queens 

 Co., Ireland). 



A very distinct species by the closely coiled whorls of its 

 dome-shaped spire and the beautiful sculpture. 



Mut. albina Schlesch is a white form of A. lamellata, found 

 in a range of hills west of Boras, Sweden, with the usual form. 

 Also taken in Ireland. 



2. Sperm odea spermatia (Castro). 



Shell minute, globulose, perforate, very strongly convex 

 above, rounded, convex beneath; rather pellucid, glossy, cor- 

 neous-amber colored, under a lens very elegantly lamelli- 

 costate. Spire roundly elevated, very obtuse, the apex smooth. 

 "Whorls 5y 2 , slightly convex, very slowly and regularly in- 

 creasing, separated by an impressed suture, the last whorl 

 scarcely wider above, slightly convex, not descending in front, 

 rounded below. Aperture nearly vertical, very narrow, 

 strongly lunate, rounded; peristome simple, unexpanded, 

 acute, the margins widely remote. Height 1^, diam. 2 mm. 

 (Castro). 



Portugal: wood of Bussaeo. 



Helix spermatia J. da Silva e Castro, Journal de Sci. Math. 

 Phys. e Nat. Acad. Real Sci. Lisboa, xi, 1887, p. 249. 



This form has not been distinguished satisfactorily from S. 

 lamellata. It has not been figured. 



Genus ACANTHINULA Beck. 



Acanthinula Beck, Amtl. Ber. Ver. Kiel, 1S46, p. 122. — 

 Pilsbry, Manual, ix, p. 280. — Wiegmann, Nachrbl. D. M. Ges., 

 1896, p. 129, and in Hesse, Nachrbl., 1915, p. 56, f. 1-3 (anat- 

 omy and systematic position). — Steenberg, Videnskab. Med- 

 del. Dansk naturkist. Foren. Kjobenhavn, vol. 69, 1918, p. 1-9 

 (anatomy). — Watson, Proc. Malac. Soc. Loud., xiv, 1920, pp. 

 6-30 (anatomy, systematic position). 



