230 TRUNCATELLINA. 



whorls less convex. Length 2.03, width 0.9 mm. Mura di 

 Castiglione ; Sassorosso. ( This name was given by "Wester- 

 lund as maruccii) . 



Subvar. simii: Differs by the smaller shell, more obese and 

 convex ; aperture toothless. Length 1.5, width 0.8 mm. Boz- 

 zano. 



Benoit's account of "Helix zanelliana Testa" (Helix zanel- 

 lia Testa, Due nuov. Conch, in Oreteo, 1842, No. 6, f. 2) ap- 

 pears to apply to the young of a Truncatellina. See Illustr. 

 sist., crit., icon. Test, estramar. Sicilia ult., p. 195, pi. 5, f . 10. 

 Benoit has also a var. minutissima, p. 196, with the synonym 

 Helix deshayesii Calcara, 1841. "When a Sicilian conchologist 

 gets a small shell, look for trouble. The combination is in- 

 auspicious. 



Pupa minuta Studer, Vol. XXVI, p. 73, was probably stro- 

 beli, as it was placed in the division with toothed apertures; 

 but the definition by a reference to Draparnaud makes it in- 

 clude cylindrica also. Westerlund included it as a synonym 

 of "minutissima/' that is, cylindrica. The propriety of using 

 minuta Stud, for the present species is further questionable 

 for the reason that Helix minuta Miiller (Hist. Vermium, II, 

 1774, p. 101) was possibly a Truncatellina, though the descrip- 

 tion is insufficient for identification. 



Truncatellina rivlerana laevestriata (Ret.). Differs 

 from the type by having the shell not ribbed. 



The single example found differs so much by the almost 

 smooth shell from the ribbed parent form that it deserves to 

 be a special variety. All three teeth are more weakly devel- 

 oped than in the typical form, but this may be merely indi- 

 vidual. From the immediate vicinity of Novorossiisk, Cau- 

 casus. 



Pupa (Isthmia) strobeli v. laevestriata Retowski, Bull. Soc. 

 Imp. Nat. Moscou, Aimee 1888 (1889), p. 284. 



Truncatellina britannica Pils. 



Vol. XXVI, p. 77. This species has been discussed by 

 Kennard & Woodward, Proc. Malac. Soc. London, XV, Oct. 

 1923, pp. 294-298, who conclude that it is quite distinct from 

 T. cylindrica. They record it from the counties Devon, Dor- 



