24 PALUDINID^). 



16. Paludina hamiltoni. 



Paludma Hamiltoni, Metcalfe, Proc. Zool. Soc. 1851, p. 73, Borneo. 

 I Borneo; ex Mr. Sowerby (c. Lornbe Taylor). 



17. Paludina philippinensis, nov. 



? Vivipara Hanleyi, Frauenfeld, Verz. Paludina, 1864, p. 618, for P. inter- 

 media, Hanley Ms., Reeve, fig. 57, 1863, Loo. ? [ not of Deshayes ] ; var. 

 = P. carinata, Reeve, 1863, Jiff. 53, Philippines [ not P. carinata, 

 Swainson,1822]. 



Long. 23, diam. 19 mil. 



This is a very closely allied from to P. javanica ; indeed, 

 probably only a geographical race, and perhaps would be better 

 classed as a variety of it ! 



It can, nevertheless, be readily distinguished by the keel on 

 the last whorls giving the suture a canaliculate appearance, by 

 the less developed spiral sculpture, by the presence of longi- 

 tudinal, subobsolete plications, as also by its shorter and more 

 decollate form, more convex whorls, the last one subangulate, 

 darker and duller epidermis and blacker peristome, which is 

 more or less angulate below. 



Yon Martens would not appear to have met with it, as it 

 cannot surely be the form he mentions, Mai. Blat. 1865, p. 148, 

 as a rounded, keelless, extreme variety of P. burroughiana ! 

 One of my specimens approaches Reeve's fig. 53 (P. carinata) 

 in the more rounded peristome and less distinct subangulation 

 of the last whorl. 



7 Majajay, Luzon; coll. R. Hungerford, Esq. 



18. Paludina costata. 



Paludina costata, Quoy, Voy. Astrol. 1832, Celebes ; _ P. angularis, Auct. 

 [ not of Mull. ] ; Tjiringen (Java), fide Mousson ; Nevill, Cat. Fasc. 

 E, p. 33. 



1 Java; coll. Baron F. von Richthofen. 



3 Luzon; ex c. A. Morelet and G. Nevill, Esqrs. 



8 Zamboanga, Philippines; coll. Prof. C. Semper. 

 14 Philippines (?); coll. Baron F. von Richthofen. 



3 S. Cruz, Luzon; coll. R. Hungerford, Esq. 



19. Paludina ingallsiana. 



Paludina Ingallsiana, Lea, Proc. Acad. Philad. 1856, Siam: long. 0,5? t 

 diam. 0, 37 inch [not of Reeve'}. 



var. 

 1 Siam; ex Mr. Sowerby (c. Lombe Taylor) 



