CHONDRINA, SECTION SOLATOPUPA. 59 



This very abundant species varies widely in size, degree of 

 variegation and in sculpture, the greatest diversity being 

 among lots from the Alpes-Maritimes. Bruguiere's type was 

 about 10 mm. long, from the south of France. 



In several lots from Italy there is a short basal fold which 

 is often so far immersed that it is not visible in a direct face 

 view (pi. 4, fig. 2, Florence). It is not constantly present 

 in any lot examined. Paget appears to have noticed this fold 

 in specimens from the Riviera, but 110 other author has men- 

 tioned it. 



The subcolumellar lamella varies from distinct to so deeply 

 immersed as to be nearly invisible, in different individuals of 

 most lots examined. 



In the Alpes-Maritimes it lives in populous colonies, accord- 

 ing to Caziot, in well-exposed, sunny places, at Saint-Jeamiet, 

 Eze, Saint Vallier, etc., up to 1000 in., on calcareous rocks. It 

 avoids alluvial plains and is very rarely found on igneous 

 rocks. A length of 16 mm. is not common, but specimens that 

 long have been found on the rocks of Eze, etc., the diani. 4 mm. 



The distribution of C. similis has been worked out by Mar- 

 gier and Caziot. In northern Italy it is rare in Piedmont, 

 but extends through Lombardy and as far as Verona in Vene- 

 tia, according to specimens in this collection. Southward it 

 appears to be confined west of the Apennines, being very com- 

 mon in Liguria, also in Tuscany (Leghorn, Florence, etc.) 

 south to a point 17 kilom. southeast of Rome. In France it is 

 found in Corsica, in the departments of Alpes-Maritimes, 

 Alpes Basses, and westward, north to Drome and Estaing 

 (Aveyrou), west to Amelie-les-Bains, in the Pyrenees. It has 

 also been recorded from the province of Gerona, eastern 

 Spain, from Fonteta and Figuera on the Ampurdan, its south- 

 ern known limits. The details of distribution are given by 

 Margier, Feuille Jeunes Nat,, 1901, pp. 139-141. 



A scalariform abnormal form resembling Clausilia scalaris 

 Pfr. has been noted by Caziot (1904, p. 150). 



Since 1848 this species has often been called P. quinqueden- 

 tata (Born), but the identity of Bora's species is very uncer- 

 tain. The figure looks more like a Clausilia, and may possibly 



