MELANIIDA. 221 
Genus BUGESIA, Paladitlhe. 
Rev. Mag. Zool. 1866, type B. bourguignati, Pal. [Montpellier]. 
Von Martens, Stimpson, &c., consider this genus, as also the 
four preceding groups, as belonging to the Hissoide, subfam. 
Hydrobiine. 
Genus MELANITA, Lamarck. 
Prod. 1799 and Syst. anim. sans Vert. 1801, type? Helix amarula, Lin- 
restr, H. and A. Adams, 1855 and Brot, 1874, type M. hastula, 
Lea. 
I have followed Messrs. Brot and Adams in adopting the group 
of M. hastula as the typical section, although I consider that 
of M. amarula, Bolten’s Genus Tiara, would have been more 
correctly adopted. 
1, Melania fuscata. 
Helix fuscata, Born, Test. Vindob, 1780, “ Virginia” [not of the Con. Indica]; 
var.=M. macrospira, Morelet, Test. nov. Austral. 1857, N. Caledonia, 
I am unable after a long and careful comparison of numerous 
specimens of both, in all stages of growth, to separate the Fijian 
and Nicobarese forms. I can see no constant difference what- 
ever, except the more conspicuously marginate suture, nor can 
I find any distinctive characters for the New Caledonian form ; 
individuals vary in the slightly more or less convex shape of 
the whorls. It is very likely that Born’s types of both M. 
fuscata and M. maculata came from the Nicobars. 
4 Nicobars ; coll. F. A. de Roepstorff, Esq. 
From Nancowry, I believe; M. Brot’s pl. 17, figs. 4a and 5, 
give a fair idea of them. 
3 Nicobars ; coll. Dr. F. Stoliczka. 
Agree well with Born’s original figure [—Brot’s pl. 18, fig. 2]; 
also Brot’s pl. 17, fig. 4 [M. aspirans], and one resembles his 
pl. 17, fig. 4 A. This I consider the young of the form. 
1 Nicobars ; ex c. Capt. R. C. Temple. 
Well represented by Brot’s pl. 17, fig.5 [M. macrospira] ; 
long. 67, diam. 16 mil. Ll 
