AMPULLARIA. 



Species 41. (Miis. Cuming.) 

 Ampullarla. fasci.^.ta. ^mp. testa ovato-globosd, tenui, 

 injlatd, umbilicatd, spird parvitisculd, subimmersd, an- 

 fractilms ad suturam impress^ canaliculatis, deinde 

 rotundatk, maUeatk, niientibus ; limdo-glaucd,fasciis 

 angnstis rufescenle-glaucis cingidatd ; aperlurd ovatd, 

 snbampM. 



The banded Ampullaria. Shell ovately globose, thin, 

 inflated, umbilicated, spire rather small, slightly im- 

 mersed, whorls impressly channelled at the suture, 

 then rounded, malleated, shining; livid glaucous, 

 encircled with narrow reddish-glaucous bands ; aper- 

 ture ovate, rather large. 



Hab. ? 



A very characteristic elegantly convoluted species, deeply 



impressed at tiie suture and conspicuously umbilicated, of 



light texture and pale glaucous colour, encircled with 



darker reddish-glaucous bands. 



We select this out of the many that have been described 



and figured by authors under the name of A.fasciata, 



trusting it may henceforth be regarded as the fixed type 



of that species. 



Species 43. (Fig. 43 and 43, Mus. Cuming.) 

 Ampullaria insularum. Amp. testa ovato-globosd, 

 tenuiculd, injlatd, augmte profunde umbilicatd, spird 

 brevissimd, immersd, anfractibus ad suturam impresse 

 canaliculatis, deinde convexis, undique dense reticulato- 

 striatis ; olivaceo-virente, pallide fasciata ; aperturd 

 circulari-ovatd, labro integro, intus rufo-aurantio 

 tinclo. 

 The island Ampdllaria. Shell ovately globose, rather 

 thin, inflated, narrowly deeply umbilicated, spire very 



short, immersed, whorls impressly channelled at the 

 suture, then convex, everywhere closely reticulately 

 striated; olive-green, faintly banded; aperture cir- 

 cular-ovate, lip entire, tinged with reddish-orange. 



D'ORBiONy,Voy. dans TAmer. Me'rid. Moll. p. 374. pi. ,51. 

 f. 1, 3. 



Hab. Isles of Parana ; D'Orbigny. Rio Grande, Bolivia ; 

 Bridges. 



The shells represented at Fig. 42 and 43 illustrate two 

 different states of this species ; one in which the surface 

 is finely indently striated, the other in which it is also 

 ridged and malleated. The suture is deeply impressed 

 and the aperture nearly circular and warmly tinged with 

 orange. M. D'Orbigny describes having found specimens 

 among the water-plants in the lakes and brooks of the 

 Isles of Parana, La Plata, which he kept alive for a twehv- 

 month afterwards without water. 



Species 44. (Mus. Cuming.) 

 Ampullaria papyracea. Amp. testd globoso-turbinatd, 

 tenuissimd, imperforatd, s'pird exsertd, obsolete spira- 

 liter liratd, anfractibus convexis, lavibus, nitentibus, 

 undique interne riifo-nigrd ; aperturd pyriformi-ob- 

 longd, labro columellari tenue reflexo. 

 The paper Ampullaria. Shell globosely tm-binated, 

 very thin, imperforated, spire exserted, obsoletely 

 spirally ridged, whorls convex, smooth, shining, 

 everywhere intense red-black; aperture pyriformly 

 oblong, columellar lip thinly reflected. 

 Spix, Test. Fluv. Brasiliensia, p. 3. pi. 4. f. 1, 2. 

 Hab. Meobamba, Western Brazil. 



Chiefly distinguished by its peculiarly light horny tex- 

 ture, and very dark shining ebony colour. 



August, 1856. 



