dean: the CI.AUSIUM IN AI.OPIA. 265 



the base of tlie shell. In a clausiuni-bearing s[)ecies there is con- 

 siderable deflection in order to allow of the development of the 

 lamellc'e and the formation of the recess into which the clausium 

 passes. In the case of a species in which the clausium is found 

 to be missing, there is always this modification in the columella and 

 in the supporting lamellas. 



The allocation of the non-clausiate species to a separate section is 

 rendered advisable. Adolph Schmidt pointed out that the so-called 

 Balea or Balea-Claiisilia of the Southern Carpathians belonged to 

 Alopia, and E. A. Bielz maintained that the group was sub-generically 

 distinct.^ A new name is, however, needed, because this term is not 

 only cumbersome but it is doubtful whether it can be correctly 

 applied to the section, as here constituted. 



New Section Ithyption. 

 Shell with the external characters of Alopia, but distinguished from 

 other ClausilicR by the absence of a clausium, by the absence or modi- 

 fication of the lamellae and plicse, and by the relatively straight 

 columella {IQv — straight, ttticov — flying), 



(Sinistral species). 

 haueri E. A. Bielz. — I have not seen examples of the typical form, 

 var. ambigua Kimakowicz. 

 ix. Donghavas, Transylvania. 

 b. Czukas, Transylvania. 

 lactea E. A. Bielz. — I have not seen examples of the typical form. 



var. glorifica Parr. — Butschetsch, Transylvania. 

 gflauca E. A. Bielz. — Tesla, Transylvania. 

 binodis Kimakowicz. — Balanbanya, Transylvania. 



( Dextral species). 

 livida Menke. — a. Malajester Schlucht, Butschetsch, Transyl- 

 vania. 

 b. Mte. Vulkan, Transylvania. 



Section Attica Bottger. 



guicciardi Roth. — Clausium nacreous-white ; small, solid, spatula 



not conspicuously bilobed, orifice broad but shallow, pedicle 



long in proportion, outer lobe not well defined, inner lobe 



raised, short, slightly produced and deflected. Dodi, Parnassus, 



. Greece. Plate 6, figure i. 



I am at present uncertain as to the true position of this species. 



The clausium, ^vilile exhibiting an affinity with Alopia., is not very 



far removed from Delima in the lobe characters, but is separate from 



i Cooke, op. cil. 



