Q4 PALUDINIDE. 
16. Paludina hamiltoni. 
Paludina Hamiltoni, Metcalfe, Proc. Zool, Soc. 1851, p. 78, Borneo. 
1 Borneo; ex Mr. Sowerby (c. Lombe Taylor). 
17. Paludina philippinensis, nov. 
? Vivipara Hanleyi, Frauenfeld, Verz. Paludina, 1864, p. 618, for P. inter- 
media, Hanley Ms., Reeve, fig. 57, 1863, Loc. ? [not of Deshayes ]; var. 
=P. carinata, Reeve, 1863, fig. 58, 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. 
Von Martens would not appear to have met with it, as it 
cannot surely be the form he mentions, Mal. 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 Mill.]; Tyiringen (Java), fide Mousson; Nevill, Cat. Fasc. 
&, p. 33. 
1 Java; coll. Baron F. von Richthofen. 
3 Luzon; exc. A. Morelet and G. Nevill, Esqrs. 
8 Zamboanga, Philippines; coll. Prof. C. Semper. 
14 Philippines (?); coll. Baron F. von Richthofen, 
8 8. Cruz, Luzon; coll. R. Hungerford, Esq. 
19. Paludina ingallsiana. 
Paludina Ingallsiana, Lea, Proc, Acad. Philad. 1856, Siam; long, 0, 52, 
diam. 0, 37 ineh [not of Reeve]. 
var. 
1 Siam; ex Mr. Sowerby (c. Lombe Taylor) 
