TRUNCATELLINA. 



75 



Appenines : Sassorosso. 



De Stefani further remarks that it may be a variety of V. 

 callicratis Scacchi, but the very small size, the somewhat 

 barrel-like form, the last whorl being more compressed than 

 the others, and the teeth, which appear to be more numerous 

 in some cases, retain it sufficiently distinct. 



TruncatelUna callicratis (Scacchi). Shell small, cylindric, 

 corneous, umbilicate; whorls 5, rounded, obliquely striate; 

 aperture ovate, toothless ; lip a little reflected. Length scarcely 

 1, diam. % line (Scacchi). 



Italy: Naples (type loc.) ; Sicily. 



Turbo callicratis SCACCHI, Osserv. Zool., 1833, p. II. Pupa 

 callicra-tis Sc., Cat. Conch. Reg. Nap., p. 16. PHILIPPI, Enum. 

 Moll. Sicil., ii, p. 220. PFR., Monogr., ii, p. 307. Pupa stro- 

 beli var. callicratis Sc., WESTERLUND, Fauna, iii, 1877, p. 126. 

 Vertigo callicratis De Stefani, Bull. Soc. Malac. Ital., ix, 

 1883, p. 182, with var. nodosaria, and subvarieties maruccii 

 and simii. 



Westerlund, w^ho obtained specimens from the original 

 locality, states that callicratis is a form of strobeli [rivierana], 

 differing from that by its still more cylindric form, rounded 

 above, the more slowly increasing whorls which are therefore 

 lower, more convex, the last built far forward in front ; by the 

 deeper suture and stronger sculpture (obliquely, finely ribbed 

 on the upper half or throughout) ; the outer lip more strongly 

 curved and expanded; the aperture as in typical strobeli, 

 three-toothed, two-toothed or more rarely toothless. 



The descriptions of the following forms are taken from 

 Westerlund, as I have not seen De Stefani 's paper. 



Var. nodosaria, De Stef. Whorls more convex; suture more 

 deeply constricted; peristome more expanded, more strongly 

 white-lipped; length 2, diam. 0.9 mm. 



Subvar. maruccii De Stef. More lengthened, with less 

 convex w-horls; somewhat larger than typical nodosaria. Sub- 

 var. simii De Stef. Smaller, more compact and convex, aper- 

 ture toothless ; length 1.5, diam. 0.4 mm. 



