KENNARD & WOODWARD : ON THE CLAUSILIID.^. 303 



So far as tlie British species are concerned, the following would 

 appear to be the best arrangement : — • 

 Family CLAUSILIIDiE. 



Gen. Balea. 



B. perversa (Linn.). 

 Gen. Laciniaria. 



L. biplicata (Mont.). 

 Gen. Clausilia. 



C. rugosa, Drap. 

 C. duhia, Drap. 



fC. joarvula (Studer) Fer. 

 fO. 2^umila (Ziegl.) C. Pfr. 

 f (7. ventricosa, Drap. 

 C. rolphii, Leach. 

 Gen. Marpessa. 



M. laminata (Mont.). 



(Those marked with a f being extinct in Britain.) 



Tentative Synopsis op the Clausiliid^, based on Wagner's 

 Classification. 



* is prefixed to the names of species which are here for the first time 

 designated as types. 



t is prefixed to genera, etc., whose members are only known in the fossil 

 state. 



§ is prefixed to names not included in the Zoological Record. 



*:,.* Boettger's subdivisions (a, 6, c, etc.) have for convenience sake been left 

 under their original genera, although the true position of many of them is at 

 present uncertain. 



Family CLAUSILIIDvE. , 



Subfani. METACLAUSILIIN^ {Metahaleince of Wagner). 

 Gen. Eeinia, Kobelt. Monotype : G. variegata, A. Ad. 



Laminifera, Boettger. Type : G. rhomhostoma, Bttg. 

 a. Pyrenaica, Boettger. Monotype : G. pauli, Mabille. 



(Syn. Tortula, Westerlund, 1878.) 

 h. "f Laminifera, s.s. 

 Graciliaria, Bielz. Type : G. concilians, A. Schm. (Vest, 



1867). 

 FusuLUS, Fitzinger. Type : G. varians (Ziegl.) C. Pfr. 



(Vest, 1867). 

 §PoLiNSKiA, Wagner. Genotype : G. litotes (Parr.) A. Schm. 

 AcROTOMA, Boettger. Type : G. komarowi, Bttg. (West- 

 erld., 1902). 

 (Syn. Thalestris, Lindholm. Type : G. sohrievskii, Rozen.) 

 Idyla, H. & A. Adams {non Yest, wee Boettger). Type : 

 G. hicnstata (Friv.) Rossm.(Mt3.in Albers, I860). 

 (Syn. Scrohifera, Boettger. Monotype : G. foveicollis 

 (Parr.) Pfr. 

 ^Pleioptychia, A. S. Wagner [? gen. nov.]. Type : 

 *G. hicristata (Friv.) Rossm.) 



