11 



XIX. Succinea, Drap. 

 1. amphibia. 



Succinea amphibia, Drap. — Succinea putTis, 



Flem. — Helixputris, Z/z'w. — Helix succinea, 



Mull. — Lymnsea succinea, Flem. (Ed . Enc) 



" Succinea ovalis, Say"* Grateloup. 



On plants by pools. Animal described by Jeffreys. 



XX. Clausilia, Drap, 

 1. rugosa. 



Clausilia rugosa, Drap. — Clausilia perversa, 

 Flem. — Helix perversa, Mull. — Turbo 

 bidens, Mont. — Turbo nigricans, Mat. and 

 Rac. — Odostomia nigricans, Flem. (Ed. 

 Enc.) 

 Animal noticed by Jeffreys. 



Walls near Douglas, and on limestone at Castle- 

 town. 



XXL Balea, Grai/. 

 1. fragilis. 



Balea fragilis, Grai/. — Balea perversa, Flem, 

 — Pupa fragilis, Drap. — " Clausilia fra- 

 gilis, Studer,'''' Menke. — Turbo perversus, 

 Lin. — Odostomia perversa, jF/em. (Ed. Enc.) 

 Animal noticed by Jeffreys. 

 Walls near Douglas. 



XXII. Pupa, Drap. 

 I. marginata. 



Pupa marginata, Drap. — Pupa muscorum, 



