MELANIIDJ3. 301 



37. Paludomas [Philopotamis] decussata. 



Paludomus decussatus, Reeve, P. Zool. 8. 1852, Ceylon, " coll. Layard " -, 

 Philopotamis sp., H. F. Stanford [not Brof], 



1 Ceylon [with operc.] j coll. H. Nevill, Esq., [as " very rare"] 

 3 John's Hill, Ceylon; coU. H. F. Blanford, E.q. 



The characteristic sculpture is very distinct in my brother's 

 fine specimen. 



Sub-Genus TANALIA, Gray. 



Proc. Zool. Soc., 1854, type Nerita aculeata, Chemnitz ; sect. = Stomatodon, 

 Benson, Ann. Mag. 1862, type Pal. stomatodon \_dist. Genus, fide Brot, 

 ISSO'}. 



Mr. Layard states that the section inhabits mountain tor- 

 rents. 



Dr. f Stoliczka described and figured a tertiary species from 

 the N". E. Alps as T. pichleri, Homes, 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, 

 Qmelin = 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, Proc. Zool. Soc. 1852, Ceylon ; = P. skinneri, 

 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. 184$, "Adam's Peak, Ceylon" [fide Brot, 

 not adult}. 



15 Ceylon ; coll. H. Nevill and H. F. Blanford, Esqrs. 



