igi 



Though IssEL has described this form as a variety of M. hiberculata Miill.. I think Brot 

 may be right in separating it, on account of the very flat whorls. 



10. Melania (Melanoides) salidadtiensis n. sp. PL XII, fig. 8. 



Stat. 133. Lake Telaga Bindu near Lirung, Salibabu-island. 24 Spec. 



Shell pyramidal, dark olive, with faint purple-brown flames, especially on the upper whorls, 

 often completely wanting on the lower ones ; strongly decollated, remaining whorls 3 to 4, 

 slightly convex near the median part, constricted below the sutures, which are very conspicuous. 

 Sculpture consisting of numerous growth-striae, of which several, at irregular distances are 

 stronger and nearly riblike, these striae are crossed by impressed spiral striae, which occupy 

 nearly the whole surface of the upper whorls (in younger specimens), leave the upper part of 

 the median whorls free and are restricted on the median part of last whorl, where the basal 

 part is smooth again. Aperture ovate with a rather sharp angle above, outer margin protracted 

 below, columellar margin with a strong layer of enamel, which is dark grey in its upper part, 

 white below, with a yellow tinge near the base and a black rim all around ; base of aperture 

 broadly sinuous. 



Alt. (of large specimen) 22, lat. 9; apert. alt. 9 Mill. 



This species is allied to M. turrimlus Lea and crepidinata Reeve, but the whorls are 

 much less convex tlian in the latter species, they better agree in this respect with M. hirrictdus 

 but in that species the base is striated, the aperture not so strongly sinuous. This latter character 

 may serve to distinguish the new species from its allies. 



1 1 . Melania (Plotia) scabra Mliller. 



MULLER. Hist. Vermium. Vol. II, p. 136. 



Brot. Martini-Chemn. Conch. Cab. Ed. II, Vol. I, Melania, p. 266, PI. 27, fig. 14, 15. 



V. Martens. Siiss- u. Brackw. Moll. Ind. Arch. p. 62. 



Stat. 33. River near Pidjot, Lombok. 8 Spec. 



Stat. 53. River near Waingapu, Sumba. 6 Spec. 



Stat. 115. River near Kwandang, North-Celebes. 4 Spec. 



12. Melania (Plotia) acanthica Lea. 



Lea. Proc. Zool. Soc. Lond. 1S50, p. 194. 



Brot. Martini-Chemn. Conch. Cab. Ed. II, Vol. I, Melania, p. 278, PI. 28, fig. 10. 



Stat. 142. River near Laiwui, Obi Major. 28 Spec. 



Small but very characteristic by the long spines of the majority of the specimens. 



13. Melania (Plotia) Savinieri Brot. 



Brot. Recueil Zool. Suisse. Vol. IV, 1886, p. 93, PL 5, fig. 9. 

 MORLET. Journ. de Conch. 1884, p. 330, PI. 7, fig. 2. 



Stat. 82. Mahakkam river, Batu Pangal, Borneo. Numerous specimens. 



83 



