MELANITDiE. 221 



Genus BUGESIA, Paladilhe. 

 Rev, Mag. Zool. 1866, type B. bourgidgnati, Pal. [^Monfpellier'\. 



"Von Martens, Stimpson, &c., consider this genus, as also the 

 four preceding groups, as belonging to the Rissoida;, subfam. 

 Hydrobiince. 



Genus MELANIA, Lamarck. 



Prod. 1799 and Syst. anim. sans Vert. 1801, type ? Selix 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. hasttda as the typical section, although I consider that 

 of M. amarula, Bolten's Genus Tiara, would have been more 

 correctly adopted. 



1. Melania fuseata. 



Helix fuseata, Born, Test. Tindoh. 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. 

 fuseata and M. maculata came from the Nicobai's. 



4 Nicobars ; coll. F. A. de Roepstorff, Esq. 



From Nancowry, I believe; M. Brot's pi. 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 pi. 18, fig. 2]; 

 also Brot's pi. 17, fig. 4 [_M. aspirans], and one resembles his 

 pi. 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 pi. 17, fig. 5 [M. macrospira'] ; 

 long. 67, diam. 16 mil. 



