LIST OF 



Specific gravity 

 of water. 



Distribu- 

 tion in 



I,AKE. 



CO 



<u 



'3 



n 



U CO 



O 



Further Distribution. 



Gastropoda. 



TORNATINIDAE. 



Tovnatina estriata, Preston 



BULIvIDAE. 



Bulla (Haminea) crocata, Pease 



NASSIDAE. 



Nassa sistroidea, G. & H. Nevill 

 ,, labecula, A. Ads. 

 ,, mar rattii, Smith 

 ,, denegabilis, Preston 



,, orissacnsis , Preston 



MURICIDAE. 



Thais carinifera (Iyarn.) 



CERITHIIDAE. 



Potamides (Tympanotonos) fluviatilis , Pot. ! 

 & Mich. . . . . I 



,, (Telescopium) fuscum, Schuni. 



TURRITELDIDAE. 



Vanesia rambhaênsis (Preston). . 



FOSSARIDAE. 



Chilkaïa imitatrix* Preston 



LITIOPIDAE. 



Litiopa (Alaba) kempi* Preston 

 ,, ,, copiosa* Preston 



HYDROBIIDAE. 



Hydrobia (Belgrandia) myliacea, Nevill 

 Stenothyra blanfordiana, Nevill. . 



miyiima (Sowerby) . . 



chilkaènsis ,* Preston 



orissaènsis* Preston 



trigona,* Preston 



obesula* Preston 



SCALARIIDAE. 



Epitonium hamatulae ,* Preston 



PYRAMIDELLIDAE. 



Pyrgulina humilis (Preston) 

 Chvysallida (Mormula) ecclesia* Preston . . 

 ,, ,, nadiensis* Preston 



Odostomia chilkaènsis * Preston 



NERITIDAE. 



Neritina (Theodoxus) souverbiana, Montr. 



CYCLOSTREMATIDAE. 



Cyclostrema (Tubiola) innocens ,* Preston . . 

 T inostoma variegatum* Preston 



TROCHIDAE. 



Umbonium vestiarium (I/inn.) 

 Solariella satparaënsis* Preston 



Lamellibranchiata. 



OSTREIDAE. 



Ostrca virginiana, Gmel. 



., cucullata, Born. 



,, lentiginosa, Sowerby 



I'ooo — i -0265 



i-ooo 



] ? 



1 - ooo — 1 -0265 

 rooo — a -0265 



? 



rooo — 1 '0265 

 i'ooo — 1 '0265 



1-005 — 1*0265 



1 '000 — 1-0265 

 1 -0265 



i-ooo — 1-015 



i— ? 



i-ooo — 1-015 

 1 -ooo — 1-0265 



? 



? 

 1 -ooo — 1 -0265 

 1 -ooo — 1 -0265 

 1 -ooo — 1 -0265 

 i-ooo — 1-015 

 i-ooo — ? 



1 -ooo — 1-0265 

 ? — 1-015 



i-ooo — ? 

 I -0265 



i-ooo — 1-0265 



? 

 I -0265 



I -0265 

 i-ooo — 1-0265 



i-ooo — 1-0265 



i-ooo — 1-0265 

 I -0265 



X 

 X 

 X 



X 

 X 



X 

 X 

 X 

 X 



X 

 X 



X 

 X 

 X 

 X 



X 

 X 



X 

 X 



? 



? 



X 



X 



X 



X 



X 



X 

 X 



X 

 X 



X 

 X 



X 

 X 



Cochin backwaters. 



Indo-pacific. 



Andamans. 



Philippines. 



Mekran coast to Solomon Is. 



Cochin and Madras backwaters ; Gangetic 



delta. 

 Madras backwaters ; Gangetic delta. 



E. Africa to Australia. 



India to Australia and Japan. 



Cochin backwaters 



Gangetic delta. 

 Gangetic delta ; Madras. 

 Western India ; Ceylon. 



Cochin backwaters ; Ceylon. 



China Sea ; New Caledonia. 



Warm and tropical seas. 



W. coast of N. America; ? all tropical 



seas. 

 Indo-pacific. 

 Î 



1 A single dwarfed specimen. 



