TJie Marine Mollusca of Bombay. 47 



Fam. Glaucomvid^. 



Glaucomya (Woodward) = Glauconome (Gray). 

 G. ccrca (Reeve). 

 A fairly common little shell, living in brackish waters. 



Fam. UNGULINID.E. 



DiPLODONTA (Brown) = MvsiA (Leach). 



D. Lidica (Desh). 



D. rotioidata (Turton). 



D. ludica is frequently met with as a little delicate 

 globular shell, the full grown specimens being only found at 

 times of rough seas. D. rotundata — This British shell 

 occurs at Aden, and a valve or two of what appears to 

 be the same is in our collection. 



Fam. DONACID.E. 



DONAX (Linn.). 



D. scortum (Linn.). 



D. incamatiis (Chem.) = Dysoni (Desh.), 



D. abbreviatus (Lam.). 



All are pretty common. 



D. Dysoni appears to be incamatiis in a }'oung form, and 

 is frequently prettily coloured with pink and purple. 



D. abbreviatus is sometimes pure white inside and out, 

 and sometimes deep purple inside and brown outside, with 

 all intermediary variations. 



Fam. PSAMMOBIID^. 



PSAMMOBIA (Lam.). 

 P. Malaccana (Reeve) = pallida (Desh.). Rare. 



SOLENOTELLINA (Blainv.). 

 vS. {PsajHjnotcea, Lam.) atrata (Desh.). 



