MELANIID. 301 
37. Paludomus (Philopotamis] decussata. 
Paludomus decussatus, Reeve, P. Zool, 8. 1852, Ceylon, “coll. Layard” ; 
Philopotamis sp. H. F. Blanford (not Brot]. 
1 Ceylon [with operc.]; coll. H. Nevill, Esq., [as “ very rare’’]. 
3 John’s Hill, Ceylon; coll. H. F. Blanford, Esq, 
The characteristic sculpture is very distinct in my brother’s 
fine specimen. 
Sub-Genus TANALIA, Gray. 
Proce. Zool, Soc., 1854, type Nerita aculeata, Chemnitz ; sect. = Stomatodon, 
Benson, Ann, Mag. 1862, type Pal. stomatodon [dist, Genus, fide Brot, 
1880). 
Mr. Layard states that the section inhabits mountain tor- 
rents. 
Dr. Stoliczka described and figured a tertiary species from 
the N. E. Alps as J. pichlert, Hornes, in the Sitz. K. Ak, 
Wien XXXVIII, 1859; I think this form is correctly classi- 
fied, but probably his figs. 7-9 represent a distinct species from 
fig..6, 
38. Paludomus [Tanalia] aculeata. 
Nerita aculeata, Chemnitz, Conch.-Cab. fig. 1642, 1786 [not Nerita aculeata, 
Gmelin = Neritina sp.]; fide Brot, 1880, should be Tanalia loricata, 
Reeve, Icon. 1847, Rapids of Adam’s Peak, Ceylon; fide Brot, var, == 
Tanalia similis, Layard. 
30 Ceylon; coll. H. F. Blanford and H. Nevill, Esqrs. 
Long. 40, diam. 35 mil. 
subvar. erinacea. 
Paludomus erinaceus, Reeve, Proce. Zool, Soc. 1852, Ceylon ; = P. skinner, 
Dohrn, P. Zool. Soc. 1857, Ceylon. 
7 Ceylon ; coll. H. Nevill, Esq, 
I cannot separate P. skinneri, Dohrn, even as a sub-variety. 
var. undata. 
Paludomus'undatus, Reeve, Icon. 1847, “ Adam’s Peak, Ceylon” [fide Brot, 
not adult]. 
15 Ceylon ; coll, H. Nevill and H, F. Blanford, Esqrs. 
