MELANIID. 247 
culata; though very closely allied, I consider them perhaps 
separable. It is also very near M. nevilli, Brot. 
\ 
subspecies malayana. 
M. tuberculata, var. malayana, Issel, Ann. Mus. Civ. Genova, VI, 1874— 
long. 13 ?, lat. 6 mil., Sarawak ; fide Brot, distinct species, 
6 Sarawak [typical]; coll. Prof. A. Issel. 
Not at all like M. Brot’s fig. 5, fairly represented by his 5A., 
perhaps, the real M. gemmulata of Reeve. The tbick substance, 
planulate whorls, and developed longitudinal sculpture seem 
the best characteristics of the form. 
35. Melania [Striatella] rivularis. 
Melania rivularis, Philippi, Abb. II, pl. IV, fig. 6, 1847, Java. 
20 Andamans; coll. F. A. de Roepstorff, Esq. 
Long. 193, diam. 63; anfr. 7. 
Perhaps scarcely separable from subspecies fontinalis, Phi- 
lippi. Some of the above exactly resemble the type figure. 
1 Java; coll. Baron F. von Richthofen. 
var, subunifascialis, nov. [? dist. sp.]. 
2 Andamans [type var.]; coll. F, A. de Roepstorff, Esq. 
A very remarkable form ; will perhaps prove specifically separ- 
able. I should have classed it as a var. of M. unifascialis, 
Mousson, from Java, but for the entire absence of longitudinal 
sculpture and the rather more convex upper whorls; the spiral 
striation is more or less obsolete on the upper portion of the 
whorls, imparting a very characteristic appearance to the shell ; 
basal band round the columella not visible within the aperture. 
Long. 19, diam. 6 mil.; anfr. 83. 
86. Melania [Striatella] commersoni. 
Melania commersoni, Morelet, Ser. Conch. II, Nov. 1860, Madagascar— 
long. 35, diam. 11 mil.; fide Crosse from Rodriguez, 
4 Mauritius ; coll. J. Caldwell, Esq. 
14 Bourbon ; coll. G. Nevill, Esq. 
