CLAUSILIA §. 20. 617 



Clausilia didyma Parr. in sched. 

 6. Major, purpureo-nigricans, albo-strigillata, anfr. 10 — H conve- 

 xiusculis, sutura submarginata; long. \3 — ii, diam. 3 — 3^^ 

 mill. ; ap. 3 mill. longa , 2 lata. 

 Claiisilia diibia Drap. Hist. p. 70. t. 4. f. 10? 



— — Desh. in Lam. Hist. Vm. p. 209. N. 28. 



— — ■ Gray Manual p. 216. t. 12. f. 143? 



— rugosa C. Pfr. Nat. L p. 63. t. 3. f. 30! 



— — Forst. in Nov. Acl. Leop. XIX. P. II. p. 279. 



t. 68. f. 9? 



— — var. Rossm. VU. t. 34. f. 477. 478. 



— crassula Pot. et Mich. Gal. Douai L p. 180. t. 18. 



f. 9. 10? 



— consocia Ziegl. olim. 



Helix dubia (Cochlodina) Fer. Prodr. N. 541. 

 Andraea dubia Hartm. in sched. 

 ^. Eadem, virenti-hyalina , albina. (Raram legi ad Wilhelmshohe prope 



Cassellam. ) 

 ■yj. Eadem ac s (saepe major), Hneis impressis, confertis distincte 

 reticulata; long. 15, diam. 3^2 mill. ; ap. 3 mill. longa, 2 

 lata. (Spec.) 

 Clausilia undulata Parr. in sched. 

 "^. Eadem ac s, gracilior: 



Clausilia rugulosa Ziegl. Mus. 



— rugosa var. Rossm. VH. t. 34. f. 486? 



t? Lamella infera distincte cruciatim biramosa (Hartm.). 

 Clausilia cruciata Stud. Verz. p. 20. 



— — Charp. Cat. moU. Suisse p. 17. t. 2. f. 9? 



— plicatula ^ Hartm. in Neue Alpina I. p. 216? 

 Helix cruciata (Cochlodina) Fer. Prodr. N. 542? 



X? Major, remotius striata (Hartm. ). 

 Helix roscida Stud. in Coxe trav. 

 Clausilia roscida Stiid. Verz. p. 20. 



— plicatula h Hartm. I. c. p. 216. 



Habitat in Europa media dlspersa. Formae typicae specimina 

 nonnisi e Britannia possideo; var. ^ rarior in Germania; y 

 et s in Germania frequentes (circum Casseliam s frequentis- 

 sima, rarius intermixta varietatibus ? et yj; similiter in Her- 

 cynia, Styria, etc), Helvetia, Gallia, Britannia, Suecia, Buco- 

 vina, etc. 



Obs. 1. Species pervariabilis quoad spirani niagis minusve gracilera, 

 aperturae formam , calkmi palatalem plicamque inferam magis minusve 

 perfectam , lamellam inferam subsimplicem, biluberculatam vel distincte 

 ramosam, nec non quoad cristas basales magis niinusve distinclas ; prae- 

 ferea interdum plicula interlamellaris adest. 



Obs. 2. Conf. praeterea tenlamen, a Cl. A. Schmidl (in Zeifschr. f. 



