CONCHOLOGV. 155 



Famili/ Melaniidse. 



Teoth in seven rows, rostrum broad. Tentacles subulate, with tlio eyes on 

 tuberosities on their outer bases. Siphonal fold rudiraeutal. Opereulura horny. 

 Shell spiral, covered usually with a dark epidermis, and more or less eroded at the 

 apex ; outer lip simple. 



MELANIIN^. 

 P.iLTTDOMns, Swainson. 



Operculum concentric. Apex usually decollated. These shells abound in hill- 

 streams, but are also found in ponds and stagnant water. 



„ AsDERsoNiANA, G. Ncv. Ava. Bhamo. 



,, BuiisiANiCA, G. Nev. Mandalny. 



,, Blasfordiana, G. Nov. Ava and Assam. 



„ CINCTA, Gould. Tenasserim Ileixdwaters. 



„ LAiiiosA, B. Tenasserim E. 



,, REOULATA, B. PegU. 



Mel.vnia, Lamarck. 



Operculum paucispiral. Apex frei|ucntly eroded. 



„ BACCATA, Gould. Thoungycn R. Upper Tenasserim. 



,, BALTKATA, Reeve. Pegu. 



,, BATANA, Gould. Tenasscrlm R. 



,, coiiRUGATA, Lam. Tavoy. 



,, FH'CTUOSA, Gould. Nowvillc, Tavoy. 



„ Haixesiana, Lea. . Pegu. 



,, HX'MEROSA, Gould. Munko, Tavoy. 



„ juGicosTis, B. Tenasserim R. and Irrawaddy R. 



,, Iravadica, W. B1. Bhamo. 



„ LixEATA, Gray. Pegu. 



„ Peguexsis, Anthony. Pegu. 



„ TRiEiioKDicA, Tryou. Thoungycn R. Upper Tenasserim. 



„ Reevki, Brot. Pegu. 



„ SCABKA, Mull. Pegu. 



,, thiarella, Lara. Tavoy. 



,, TUnEKCULATA, MiiU. PcgU. 



„ VARiAniLis, B. Pegu and Tenasserim. 



M. Ilcrculea, Gould. Tavoy. 



M. gloriosa, Ant. Pegu hill streams. 



Family Littorinidse. 



Teeth in seven rows. A rudimcntaiy siphonal fold. Foot grooved below. 

 Operculum horny, paucisinral. Shell turbinate or depressed ; never pearly. 



LiTTORixA, Fcrussac. 



The Liltorimm or Periwinkles are many of them very amphibious, living more out 

 of the water than in it, though always within reach of the spray. Others again affect 

 the zone between tidemarks, and a few are extensively collected for food. 



* ,, SCABRA, L. 



var. angulifera, Lam. 



* ,, uxDULATA, Phil. Andamans. 



* ,, MOLUCCANA, Phil. 



* ,, IJITEEMEDIA, Phil. 



* ,, MELANOSTOMA, Gray. 



* ,, VEXTEicosA, Phil. Andamans. 

 *RisELLA LUTEA, Quoy ct Gaimard. 



