218 MELANIIDA, 
var, perdecollata, nov. 
Brot, pl. 44, fig. 8, Habit. ? 
10 Southern Province, Ceylon; coll. G. Nevill, Esq. 
Long. 763, diam. 21 mil. Apparently a form constantly 
characterized by the strong decollation, erosion of the surface, 
and iron-rust, 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. 
Elem. Conch., 1822, type Buc. flumineum, Gmelin, 
2. Faunus [Melanatria] flumineus. 
Buccinum flumineum, Gmelin, Syst. Nat. 1788, Hab.? ; fide Brot, var. = 
Pirena aspera, Brot, var. = ? P. cecillei, Phillippi, 1849, Madagascar, 
var. = P. plicata, Reeve = lamarcki, Val. = Sraterna, Lea = Mel, 
subimbricata, Phil, (spec. guv.], 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 pl. 43, fig. 2. 
3. Faunus {[Melanatria] spinosus. 
Pirena spinosus, Lamarck, Anim. sans Vert., 1822, Madagascar. 
5 Ranomafane [Madagascar] ; 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 pl. 42, 
fig. 1 A and B. 
? Genus PIRENOPSIS, Brot. 
Conch.-Cab. IT, 1879, p, 408, type Melania costata, Quoy [Vanikoro]. 
Not represented in the Museum, 
