MELANIID.E. 



Genus BUGESIA, Paladilhe. 



Kev. Mag. Zool. 1866, type B. bourguignati, Pal. \JMontp ellier\. 



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

 four preceding groups, as belonging to the Rissoidce, subfam. 

 Hydrobiince. 



Genus MELANIA, 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. Tiastula as the typical section, although I consider that 

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

 correctly adopted. 



l. Melania fuscata. 



Helix fuscata, Born, Test. Vindob. 1780, " Virginia" [not of the Con. Indica] ; 

 var.= M . macrospira, Morelet, Test. nov. Austral. 1857, tf. 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 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 j ex c. Capt. R. C. Temple. 



Well represented by Brot's pi. 17, fig. 5 \M. macrospira"] ; 

 long. 67, diam. 16 mil. 



