348 PKOCKEDINGS OF THE MALACOLOGICAL SOCIETT. 



JETah. — Brazil, Guyana, etc. 



This is smaller and comparatively broader than A. columellaris, 

 to which it is allied. 



21. Ampullaria Crosseana, Hidalgo. 

 Journ. de Conch., 1871, vol. xix, p. 206; vol. xx, p. 242, pi. vii, fig. 1. 



Sab. — River Amazon. 



This is allied to A. gigas, Spix, of which it may prove to be 

 a variety without colour-bands. 



22. Ampullaria Cumingi, King. 

 Zool. Journ., vol. v, p. 344; Reeve, Conch. Icon. Amp., sp. 81. 

 A. peristomata, D'Orbigny : Mag. Zool., 1835, p. 33. 

 A. miltocheilus, Reeve: Conch. Icon. Amp., sp. 120. 

 A. Qiiitensis, Y. d. Busch : Proc. Zool. Soc, 1859, p. 168. 



Hab. — Prov. of Chiapes, Mexico (Grhiesbreght) ; Panama ; Quito. 



23. Ampullaria cyclostoma, Spix. 

 Test. Fluv. Brasil., 1827, p. 4, pi. iv, fig. 5. 

 A. Spixii, D'Orb. : Moll. Voy. Amer. Merid., 1839, p. 376, pi. lii, 



figs. 7, 8. 

 A. elegans, D'Orb. : Mag. de Zool., 1835. 

 A. pulchella, Anton: Yerz. Conch., 1839, p. 50. 

 Hab. — Rio Parana, La Plata, Bolivia, etc. 



Yar. ELEGANS, D'Orbigny. 

 A. elegans, D'Orb. : Mag. de Zool., 1835. 

 Hab. — La Plata, 



Yar. RoissYi, D'Orbigny. 

 A. Roissyi, D'Orb.: Moll. Yoy. Amer. Merid., p. 377, pi. lii, figs. 1-3. 

 Reeve places A. cyclostoma, Spix, with A. Platce, Maton, which is 

 quite difi'erent. 



24. Ampullaria Da CosTiE, n.sp., p. 359. 



25. Ampullaria decussata, Moricand. 

 Mem. Soc. Phys. Geneve, vol. viii, p. 445, pi. ii, figs. 26, 27 ; Reeve, 



Conch. Icon., sp. 127. 

 A. intropicta, Reeve: Conch. Icon., sp. 89. 

 Hab. — Brazil. 



26. Ampullaria dolioides, Reeve. 

 Conch. Icon., sp. 75. 

 Hab. — La Plata, etc. 



27. ^Ampullaria D'Orbignyana, Philippi. 



Conch. Cab,, p. 65, pi. xxi, fig. 4. 



A. canaliculata, var., D'Orb. : Yoy. Amer. Merid., pi. iv, fig. 4. 

 Hab. — La Plata. 



, ' This is A. canaliculata, Lamk. ; see note, p. 363. 



