186 SPERMODEA. 



parent, and like the other land snails has 4 tentacles; but on 

 the longer pair I could find no eye-spots, though I observed 

 the animal with great care both in the grotto and after I had 

 taken it home. ' ' 



Full-grown specimens of this species showing the weakly 

 but distinctly lipped and narrowly expanded peristome are 

 found in few collections; only so is it explicable that the 

 species has been ranked sometimes in Punctum, sometimes in 

 Pahda. With these characters of the shell in view we find a 

 great agreement with the forms of the group Aspasita Wstld., 

 which has been recognized to be a Pupid {Sturany and 

 Wagner) . 



Subfamily Acanthinulinas. 



This group of three or four genera is now believed by some 

 nialacologists to be closely related to Vallonia. 



Genus SPERMODEA West. 



Spermodea Westerlund, Methodus dispos. Conch, extra- 

 mar. Reg. Palaearctica viv., in Rada Jugoslav. Akad. Znanosti 

 i Umjetnosti, vol. 151, 1902, p. 90, type Hx. lamellata Jeffr. 



Helix and Acanthinula of authors. 



The shell is umbilicate, heliciform, slightly wider than high, 

 with dome-shaped spire of closely coiled, narrow whorls, the 

 initial iy 2 microscopically, irregularly pitted, the rest axially 

 costulate. Aperture subvertical, lunate, with simple sharp lip, 

 the columellar margin dilated, insertions remote. 



Type : Helix lamellata Jeffr. Distribution : Europe. 



By characters of the shell this group appears to differ suffi- 

 ciently from Acanthinida for generic distinction. The single 

 Tertiary species known, S. plicatella is extremely similar to 

 the existing 8. lamellata, and is regarded by Wenz as prob- 

 ably ancestral to that. 



Spermodea plicatella (Reuss). Helix plicatella Reuss, 

 Palasontographica, ii. 1849, p. 11, 21, pi. 1, f. 10. — Acanthi- 

 nida plicatella Wenz, Foss. Cat., p. 975. — Helix corcxdum A. 

 Braun, Amtl. Bericht iiber d. 20. Versamml. Ges. D. Naturf. 

 u. Aerzte zu Mainz, 1842, p. 148 (nude name). — Helix eorcu- 



