20 DESCRIPTION OP NEW 



are the more interesting, as they present a link approaching those 

 Naiades which have a single line under the dorsal margin, and which 

 are connected with this species through the Symphynota Bengalensis 

 (nobis). Intervening species may be discovered to make the " nuance" 

 complete. 



Melania plicata. Plate XXIII. fig. 95. 



Testa subturrita, plicata, castanea, tuberculata, fasciata; suturis impressis; apertura 

 ovata. 



Shell somewhat turrited, folded, chesnut coloured, tuberculated, banded ; sutures im- 

 pressed ; aperture ovate. 



Hab. Bengal ? 



My Cabinet. 

 Diam. -8, Length 2 inches. 



Remarks. — Among numerous freshwater shells brought by Captain 

 Lang from Calcutta, I obtained a single specimen of this species. 

 About one-third the distance below the suture it is furnished with a 

 row of tubercles, each of which terminates a somewhat oblique fold. 

 Inferior to this there is a disposition to carination. The tubercles 

 give the shell slightly the aspect of M. amarula (Lam.), but it cannot 

 be mistaken for that species, as its spire is quite elevated. The indivi- 

 dual above described being decollated, it is impossible to give the num- 

 ber of whorls, or the character of the apex. 



