218 MELANIID^. 



var. perdecollata, nov. 



Brot, pi. 44, fig. 3, Habit. ? 



10 Southern Province, Ceylon; coll. G. Nevill, Esq. 



Long. 76^-, diam. 21 mil. Apparently a form constantly 

 characterized by the strong decollation, erosion of the surface, 

 and iron-rnst, reddish colour of the peristome, &c. ; mostly with 

 specimens of an oyster attached, half as large as themselves. 

 Very variable in size. 



Sub-Genus MELANATRIA, Bowditch. 

 Mem. Conch., 1822, type Sue. flumineum, Gmelin. 



2. Faunus [Melanatria] flumineus. 



Buccinura flumineum, Gmelin, Syst. Nat. 1788, Hob. ? , fide Brot, var. = 

 Pirena aspera, Brot, var. = ? P. cecillei, PMllippi, 1849, Madagascar, 

 var. = P. plicata, Reeve = lamarclci, Val. = fraterna, Lea = Mel. 

 subimbricata, Phil. [spec.juv.~\, var. = P. maura, Reeve, West Africa. 



var. plicata. 

 Pirena plicata, Reeve, Icon., 1859, Madagascar. 



1 Madagascar ; coll. J. Caldwell, Esq. 

 Agrees exactly with M. Brot's pi. 43, fig. 2. 



3. Faunus [Melanatria] spinosus. 



Pirena spinosus, Lamarck, Anim. sans Vert., 1822, Madagascar. 

 5 Ranomafane [Madagascar] j coll. J. Caldwell, Esq. 



I am informed that " Ranomafane " means " warm water," 

 and that the above specimens were taken from some hot springs 

 in the bed of the river; they agree with M. Brot's pi. 42, 

 fig. 1 A and B. 



? Genus PIRENOPSIS, Brot. 



Conch.- Cab. II, 1879, p. 408, type Melania costata, Quoy [Vanikoro']. 

 Not represented in the Museum. 



