AGARDHIA. 137 



Provincia Comasca, 1838, p. 57, pi. 1, f. 4a-e ; with var. elon- 

 gata, intermedia-, guttula. — Kuester, Conchyl. Cab., Pupa, p. 

 59, pi. 7, f. 22-25.— Pfr., Monogr., ii, 333.— Gredler, Nachrbl. 

 D. M. Ges., xi, 1879, p. 112 (Val Lorrina, Tyrol).— Stabile, 

 Delle eonchiglie terr. e fluv. del Luganese, 1845, p. 35, with 

 var. parva; Prospetto sist.-statist. dei Molluschi terr. e fluv. 

 viv. nel territorio di Lugano, 1859 (in Atti Soc. Geol. Milano, 

 i, fasc. 3, pp. 33, 58, with mut. normalis based on Porro's 

 var. elongata, fig. 4 a, b, c. — Pollonera, Bull. Soc. Malac. 

 Ital., xii, 1887, p. 219.— Pini, Bull. Soc. Malac. Ital., ii, 1876, 

 p. 165 (Esino territory). — 0. Reinhardt, Nachrbl., vol. 46, 

 1914, p. 75 (immature shell). — Sphyradium ferrari Hart- 

 mann, Erd- und Siisswasser-Gastropoden der Schweiz, 1844, 

 p. 53, pi. 14, f. 1, 2, and as S. guttula, f. 3, 4. — Clessin, Mol- 

 luskenfauna Oesterreich-Ungarns, 1887, p. 248, f. 149. — Coryna 

 ferrari Porro, Westerlund, Synops. Moll, extramar. Reg. 

 Pakearct., 1897, p. 74. — Caziot, Etude Moll. terr. et fluv. 

 Monaco et Dep. Alpes-Maritimes, 1910, p. 334, pi. 8, f. 10, 11. 

 — Locard, Ann. Soc. d'Agric. Sci. Ind. Lyon (7), iii, 1896, 

 p. 213. — Flach, Verb., phys.-med. Ges. Wurzburg, xxiv, 1890, 

 p. 7. 



Pupa biplicata Rossmaessler, Iconogr., 1839, ii, p. 26, pi. 

 49, f . 641 ; not of Michaud. 



The combination of a continuous, free peristome, a strongly 

 pinched base and a finely ribbed surface distinguishes A. fer- 

 rari from all species except A. bland, which differs chiefly by 

 its larger teeth. 



Porro noticed three sizes, thus: 



Var.: (a) elongata, alt. mill. 5, width mill. iy 2 , whorls 8. 



(b) intermedia, [no definition] . 



(c) guttula, alt. mill. 4, width mill. 1%, whorls 7. 



Stabile proposed the term "mut. normalis" for Porro's 

 elongata without other definition. He added a var. parva, 

 alt. 3%', width iy 2 mm., Prov. Ticino, Switzerland. So far as 

 I know, these mutations in length have no racial status, being 

 fully connected by intermediate sizes in the same lot, as 

 Hartmann stated over 80 years ago in his good account of 

 this snail. All of the shells before me fall between 4 and 5 

 mm. in length. 



The records of this species as a living snail in the Dep. 

 Alpes-Maritimes are vague and unsatisfactory. Caziot had 



