352 GRANOPUPA. 



Mazzara and island of Maretimo, the specimens larger and 

 dark chestnut (Benoit). 



Bidimus rupestris PHILIPPI, Enumeratio Molluscomm Sici- 

 Hae, 1836, p. 41, pi. 8, f. 18. Pupa rupestris Phil., KOSSM., 

 Iconogr., ii, pt. x, p. 25, in part. PHILIPPI, Enum., ii, p. 113. 

 -KUESTER, Conch. Cab., p. 19, pi. 3, f. 1-3. PFR., Moiiogr., 

 ii, p. 310. BENOIT, Illustr. sist., crit., iconogr. Testae, estra- 

 mar. Sicil., pi. 5, f. 36 ; Nuovo Catal. Conch, terr. e fluv. Sici- 

 lia, 1881, p. 95. Pupa (Riipestrella) rupestris Ph., MONTE- 

 ROSATO, II Nat. Siciliano, xiii, 1894, p. 170 (Monte Pellegrino). 

 Pupa rupestris var. &, A. BIVONA, Nuovi Moll. terr. e fluv. 

 Palermo, 1839, p. 19, fig. 9. 



Not Pupa rupestris Studer, var. conica Ben., DE GREGORIO, 

 II Nat. Siciliano, xiv, p. 204. error for Helix rupestris conica 

 Benoit. 



This species is much more strongly ribbed than the Algerian 

 dupoteti, with which some authors confused it. It appears 

 from the records to be widely spread in Sicily ; but there are 

 several varieties which require local study. 



The typical form (pi. 49, fig. 6) is 4 mm. long or slightly 

 larger, rather finely rib-striate, with about 5y 2 whorls. 



G. rupestris colo'ba n. subsp. PI. 49, fig. 4. A smaller form, 

 length 3.1, diam. to edge of lip 1.8 mm., 5 whorls; more 

 coarsely striate. 



There is also a form with far less convex whorls (pi. 49, fig. 

 2), which may possibly be a different species. 



14. GRANOPUPA HOMALA (West.). 



Shell rimate-perforate, ovate-conic, reddish-brown, rather 

 obsoletely, obtusely costulate; spire broadly conic. Whorls 

 5y 2 , convex, separated by an impressed suture, regularly in- 

 creasing, the last whorl a little larger than the penult, not 

 swollen, rounded at the base, and ascending a little in front. 

 Aperture ovate, toothless, the margins joined by a very thin 

 callous ; columellar margin lightly arched, the outer margin 

 strongly curved above. Length 5, width 2 1 / 4 mm. (West.). 



Sicily: Monte Galdo (M. de Monterosato) . 



Pupa (Torquilla) homala WESTERLUND, Nachrbl. d. m. Ges., 

 1892, p. 192. Modicclla homala WEST., Synopsis, p. 102. 



