66 TRUNCATELLINA. 



slightly oblique; without teeth. The whitish peristome ex- 

 pands a little and is somewhat thickened within, the termina- 

 tions joined by a thin callus. 



Length 2.13, diam. 0.9 mm. ; 6y 2 whorls. France. 



Length 1.95, diam. 0.87 mm. ; 6 whorls. Auxonne. 



Length 1.63, diam. 0.8 mm. ; 5y 2 whorls. Auxonne. 



Length 1.65, diam. 0.80 mm. ; 6 whorls. Auxonne. 



Length 1.75, diam. 0.8 mm. ; 6 whorls. Tyrol. 



Length 1. 85, diam. 0.82 mm. ; 6 whorls. Dorset. 



Europe; North Africa in Morocco and Tunis; Crimea; 

 Asia east to the Caucasus. 



Pupa muscorum, a, DRAP., Hist. Nat. Moll. terr. et fluv. de 

 la France, 1806, p. 59, pi. 3, f. 26, 27, in part. Not of Linne. 

 Vertigo musconmi MOQUIN-TANDON, Hist. Moll. Fr., 1855, 

 p. 399, pi. 28, f. 22, 23. BOURGUIGNAT, Malac. de 1'Algerie, ii, 

 1864, p. 98, pi. 6, f. 28-30 (debris of the Harrach and Ras- 

 sauta near Algiers). Isthmia muscorum Loc., LETOURNEUX et 

 BOURGUIGNAT, Prodr. Malac. Tunisie, 1887, p. 109 (Algeria: 

 Harrach, Algiers, Bou-Saada, Bone). 



Vertigo cylindrica FERUSSAC, Tabl. Syst., 1821, p. 64. 

 Isthmia cylindrica, Fer., REINHARDT, Nachrbl. d. Malak. Ges., 

 vol. 48, 1916, p. 68. 



Pupa minutissima Hartm., of most authors ; PFR., Monogr., 

 ii, 306; iii, 532; iv, 663; vi, 301; viii, 362. - - KUSTER, Syst. 

 Conch. Cab., p. 100, pi. 14, f. 6-8. - - MORELET, J. de Conch., 

 xxviii, p. 61 (Tanger, Morocco). HIDALGO, J. de C., xxvi, p. 

 242 (Balearic Is.; apparently includes rivierana) . - - Ross- 

 MAESSLER, Iconographie, i, pt. 1, p. 84, pi. 2, f. 38. JEFFREYS, 

 British Conchology, i, p. 270. Pupa minutissima var. angus- 

 tata Mouss., KOBELT, Catalog eur. Fauneugeb. leb. Binnen- 

 conch., 1871, p. 32 (Epirus; nude name). --Pupa (Isthmia) 

 minutissima Hartm., BOETTGER, Jahrb. d. m. Ges., x, 1883, p. 

 183; vi, 406; vii, 139 (Caucasus). -- Isthmia minutissima 

 (Hartm.) BOETTGER, Jahrb. Nassau. Ver. Nat,, 42, 1889, p. 

 275 (distribution, Pleistocene and Recent). STEENBERG, Dan- 

 mark's Fauna, Landsnegle, 1911, p. 171, f. 141. 



This is the most widely distributed species. Its northern 

 limit has been roughly denned by the localities Skye, Christi- 



