- 112 — 



Giustina) — var. cingulatior Sacc. 17, 21 Tongriano (Carcare) — Id. 

 18, 20, Tongriano (Cairo) — Id. 19, Tongriano (Dego-Piana) — var 

 compressa Sacc. 22, Tongriano (Pareto) — var. inornata Sacc. 23, Ton- 

 griano (Pareto). 



Tav. VII. 



Potamides proni argaritacens Sacc. var. tuberculosa Sacc. 1, 2, 3, Ton- 

 griano (Carcare) — Id. 4, 5, 6, 7, Tongriano (Dego) — var. Squi- 

 llatali Sacc. 8, Tongriano (S. Giustina) — anomalia 2. a 9, 11, Ton- 

 griano (S. Giustina) — anomalia 3." 10, Tongriano (Sassello) — 

 anomalia l. a 12, Tongriano (S. Giustina). 



Potamides Isseli Sacc. 13, Tongriano (Sassello) — Id. 14, 15, Tongriano 

 (S. Giustina). 



Potamides solitarius Sacc. 16, Tongriano (Stella) — Id. var. 17, (Sas- 

 sello) — var. sasselliana Sacc. 18, 19, Tongriano (Sassello). 



Potamides ligusticus Sacc. 20, Tongriano (Carcare). 



Potamides Rovasendae Sacc. 21, Elveziano (Colli torinesi). 



Potamides pedemontanus Sacc. 22, 23, 24, Elveziano ( Santuario di Vico ) 



— var. minor Sacc. 25, 26, Elveziano (Termofourà nei Colli torinesi) 



— Id. 27, 28, Elveziano (Colli torinesi) — var. taurinensis Sacc. 29. 

 Elveziano (Val Ceppi nei Colli torinesi). 



Potamides margaritaceus Br. var coniungens Sacc. 30, 31, Elveziano 

 ( Colli torinesi ). 



