MELANIIDA. 281 
93. Melania [Plotia] datura. 
Melania datura, Dohrn, P. Zool. S. 1858, Ceylon, long. 21, diam. 11 mil. ; 
Con. Indica, pl. 73, fig. 10. 
M. Brot unites, as a variety, the forms from Ceylon figured 
in the Con. Indica, pl. 110, fig. 7 as M. scabra, var. spinulosa 
and fig. 10, as M. acanthica, Dohrn ; this is, I think, more than 
doubtful, as also, I consider, is his statement that the three forms 
are found together ; this is quite opposed to all I know on the 
subject, and it would be desirable if the Professor would give 
his authority for the statement. 
2 Ceylon ; coll. H. Nevill, Esq. 
94. Melania [Plotia] acanthica. 
Melania acanthica, Lea, P. Zool. S. 1850, Manilla and Negros, long. 0°8 
diam. 0°4. 
var. roepstorffiana, nov. 
3 Andamans [type var.] ; coll. F. A. de Roepstorff, Esq. 
Long. 183, diam. 92 mil. ; anfr. 7. 
Very near M. Brot’s pl. 28, fig. 10A. [Philippines]. 
subvar. brevispira, nov. 
4 Andamans; coll. F. A. de Roepstorff, Esq. [122, 62). 
subvar. subscabra, nov. 
2 Andamans ; coll. F. A. de Roepstorff, Esq. [144, 72]. 
A connecting link with Mel. scabra, the spines being rather 
less developed. 
95. Melania [Plotia] scabra. 
Buccinum scabrum, Willer, Hist. Verm. 1774, Coromandel ;=W. spinulosa, 
Lamarch, Hist. 1822, Timor, long. 10 lignes ; fide Brot,=U. doreyi- 
ana, Lesson, 1830, Nouv. Guinée, long, 8, diam. 3 lignes; fide Brot= 
M, denticulata, Lea, P. Z. S. 1850, I. Negros [not of Reeve ] ; var. 
=H. cochlea, Brot, Conch.-Cab. II, 1874, pl. 27, fig. 10, “ India,” 
[as of Lea, P. Z.8. 1850, Hab.?]; var.=M. myurus, Brot, Rev. 
Zool. 1860, type Java, also Halmaheira [Landauer] and Borneo [Issel] 
