MELANIlDJi]. 301 



37. Paludomas [Philopotamis] decussata. 



Paludomus decussatus, Reeve, P. Zool. S. 1852, Ceylon, " coll. Lai/ ard " ; 

 Fhilopotamis sp., H. F. Blanford [not JBrof], 



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

 3 John's Hill, Ceylon; coll. H. F. Blanford, Esq. 



The cliaracteristic sculpture is very distinct in my brother's 

 fine specimen. 



Sub-Genus TANALIA, Gray. 



Froo. Zool. Sac, 1854, type Nerita aculeata, Chemnitz ; sect. = Stomatodon, 

 Benson, Ann, Mag. 1862, type Pal. stomatodon [dist. Genus, fide Prot, 



ISSO^. 



Mr. Layard states that the section inhabits mountain tor- 

 rents. 



Dr. 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, ConcTi.-Cah. fig. 1642, 1786 [not Nerita aculeata, 

 Owelin = Neritina sp.'] ; fide Brot, 1880, should be Tanalia loricata, 

 lieeve, Icon. 1847, Rapids of Adam's Peak, Ceylon; fide Brot, var. = 

 Tanalia similis, Layard. 



30 Ce} Ion ; coll. H. F. Blanford and H. Nevill, Esqrs. 



Long. 40, diam. 35 mil. 



suhvar. erinacoa. 



Paludomus erinaceus, Reeve, Proc. Zool, Soc. 1852, Ceylon; = P. sHnneri, 

 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 PeaJc, Ceylon" [fide Brotj 

 not aduW], 



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



