SOAVEKBT : ON AMPULLAEIID^. 353 



Var. PH^osxoMA, Philippi. 

 A. phceostoma, Phil. : Conch. Cab., p. 45, pi. xiii, fig. 2. 



Var. POKPHYROSTOMA, lleeve. 

 A. porphyrodoma, Reeve: Conch. Icon., sp. 30. 

 Hah. — IS^ew Granada. 



Var. PYRUM, Philippi. 

 A. pyrum, Phil. : Conch. Cab., p. 18, pi. v, fig. 2, 



Var. RKFLEXA, Swainson. 

 A. reflexa, Swainson : Zool. lUust., vol. iii, p. 173. 

 Hab. — Cuba. 



Var. EETUSA, V. Olfers. 

 A. retusa (V. Olfers), Phil. : Conch. Cab., p. 18, pi. v, fig. 1. 



Var. YucATANENSis, Crosse & Fischer. 

 A. Tucatanensis, C. & F. : Journ. de Conch., 1890, p. 110. 

 Hah. — Yucatan. 



46. Ampullaria impervia, Philippi. 

 Zeitsch. f. Malak., 1852, vol. ix, p. 21. 



Hab. — Bolivia, etc. 



Var. NUBiLA, Reeve. 

 A. nubila, lleeve: Conch. Icon., 1856, sp. 65. 



Hab. — River Salamonis, Amazons. 



This species is generally known as A. nubila, which, although it 

 is generally less elately conical, cannot be separated from Philippi's 

 species. Philippi's type is imperforate, but most of the specimens 

 are more or less umbilicated. 



47. Ampullaria innexa, Crosse & Fischer. 

 Journ. de Conch., 1890, vol. xxxviii, p. 111. 

 Hab. — Monte de Mistan, Mexico. 



48. Ampullaria insularum, D'Orbigny. 



Voy. Amer. Merid., Moll., 1839, p. 374, pi. li, figs. 1, 2; Reeve, 



Conch. Icon., figs. 42, 43. 

 A. vermiformis, Reeve: Conch. Icon., sp. 54. 

 A. fasciata, Reeve ; Conch. Icon., sp. 41. 

 A. australis, D'Orb. : Voy. Amer. Merid. 



A. Georgi, J. W. Williams : Ann. Mag. jSTat. Hist., 1889, vol. iv, 

 p. 47. 



Hab. — Parana, Rio Grande, Bolivia, Paraguay, etc. 



I cannot agree with Nevill in uniting this with A. gigas. The 

 shell is stouter in substance, more oblique in form, and has a roughly 

 striated surface. Reeve's type of A. vermiformis is still more oblique, 

 but it cannot be separated from A. insularum. 



49. Ampullaria interrupta, n.sp., p. 3G1. 



