162 ON THE NAIADES, 



genus. It is remarkable for its size and weight, and the strong and 

 wide callus on the columella. Under the epidermis it varies from a 

 dark orange to lemon yellow. A depauperated specimen in my pos- 

 session would scarcely be recognized as the same species, owing to the 

 density of the orange colour. The apex of the perfect shell, having 

 but a thin epidermis, presents an orange appearance, — this colour may 

 also be observed on the inside of the shell. At the base of the colum- 

 ella there is an obsolete tubercle. The band sometimes consists of a 

 single white line only. It is believed these specimens formed part of 

 the collection brought from Java bv Mr fc-hillaber. 



Helicina viuginea. Plate XIX. tig. 58. 



Testd subconicd, apice acutd, subtus inflatd, crassd, transversim rmiUisulcatd ; 

 attfraclibiis senis ; spira elevutd ; aperturd valde dilatatd ; labro effuso; colu- 

 me.lld subcallosd. 



Shell subconical, acutely pointed, inflated below, thick, with many transverse fur- 

 rows ; whorls six ; spire elevated ; aperture much dilated ; outer lip effuse ; columella 

 thinly coated. 



Hab. Java? 



Helicina striata ? Lam. 



My Cabinet. 



Diam. -8, Length -8 of an inch. 



Remarks. — This species came in the same collection as that de- 

 scribed last. It is nearly of the same diameter. It differs from it 

 altogether in form and colour. It is remarkable for its acutely pointed 

 apex, its milk-white appearance, and its numerous furrows. The 

 outer lip may, with propriety, be said to be effuse rather than re- 

 flected. 



