MELAXIA. 



301 



Genus MELANIA, Lamarck. 



Shell subulate, elongated ; spire many-whorled, acute, 

 whorls smooth, not spinose ; aperture ovate, acuminate, 

 posteriorly entire, rounded in front ; inner lip thin, not 

 callous ; outer lip simple, acute, margin entire. 



S]/n. Turritella, Link., not Lain. Ellistoma, Rqfin. 

 Melanites, Kruy. Hygronoma, Gist. 



Ex. M. hastula, Lea, pi. 32, fig. 1. Operculum, M. 

 hastula, fig. 1, a, 1, h. Shell, M. hastula, fig. 1, c. 



The species of this genus appear to be peculiar to 

 tropical countries, where they inhabit streams and stag- 

 nant waters ; the apex of the spire, which is perfect in 

 young individuals, afterwards usually becomes eroded or 

 truncate. 



Sjiecies of Melania. 



aculeus, Lea. 

 acus, Lea. 

 albescens, Lea. 

 angusta, Fhil. 

 aspirans, Hinds. 

 australis, Lea. 

 blatta, Lea. 

 canalis, Lea. 

 cancellata, Bens. 

 castanea, Lea. 

 cincta, Lea. 

 costulata, Lea. 

 cuspidata, Chem. 

 erosa, Less. 

 fceda, Lea. 

 flammulata, V. d. Busch. 



figurata, Hinds. 

 florata, Hinds. 

 fulgurans, Hinds. 

 furaosa, Hinds. 

 funiculus, Quoy. 

 hastula, Lea. 

 hians, Lea. 

 indefiuita, Lea. 

 inhonesta, V. d. Busch. 

 juncea, Lea. 

 Liebmanni, Phil. 

 luctuosa. Hinds. 

 Miudorensis, Lea. 

 modesta, Lea. 

 Nicobarioa, Morch. 

 pallida, Lea. 



