PLATE XLIX. 



Helix Perversa : testa subambilicata ovata-oblonga contraria 

 sulphurea. Linn. Mus. Lud, Ulr. 669. n. S74. 

 Gmel, Linn. Syst. Nat, 3642. n. ^^.—Seha Mu^. 

 3 t. 40/. 37. 



Helix dextra. MuIL Verm. % p. Sd*— Chemnitz 9. 2. p. 153. 



t. 134./. l^lO.—Vm.'-Gmel. p. 3643. 

 Helix sinistra. MulL Verm. 2 p. 90< 

 Limax aureus. Martyn, Unlv, Conch. 3. t. 115. 



CiiERSlNA FuLVA: h, Le jau7ie, yellow chersin Prince's Island* 

 C H E R s I N aP E R V E R s A ,i57i£? reverse yellow chersin 

 Prince's Island, Chersina Perversa, f, 

 yellow chersin^ striped with rich red brown. 

 La Bouche d Gauche, reverse. L'Esc argot. 

 Cat. Calonne, Mus. p. 63. 1163. 1164, 



BuLiMUS CiTRiNUS: Bruguiere Encycl. Method. p. 313. reverse 

 Brug, Enc, Method, p. 314. 



Helix Aurea. Dillwyn Catal. Shells, t. 2 p. 936. n» 113. 



Helix Aurea. Daudeb, Hist, des Moll. No. 414. 



EuLiMi s CiTRiNUS : Bulime citron, LamarcJc. Anim. sans 

 Vertebr, t, p. 2. 119. 



The more fully we consider the shells before us and their im- 

 mediately approximating varieties, the more entirely we become 

 persuaded that several shells of this kind which have been described 



