360 MESSES. MELVILL AND SXANDEN ON [June 18, 



Natica (Mamilla) melanostoma Grmel. 



Var.^6rosa Souleyet. 

 P.Gr. Gulf of Oman, Maskat. 24 fathoms, mud. 



Var, zanziharica Recluz. 

 M.C. No special locality mentioned. 

 I. Bombay {Ahercrombie). 



SlGABETTTS OUVIEEIANUS EecluZ. 



I. Bombay {Ahercrombie), 



Stgaretus neritoideus L. 

 I. Karachi. 



SiGARETUS PLANULATUS EecluZ. 



I. Bombay {Ahercrombie), 

 SiGARETUS (Eunaticina) eibula Eve. 

 I. Bombay {Ahercrombie). 



SiGARETUS (Eukaticina) PAPILLA Gmel. 

 P.G. Gulf of Oman, Jask. 

 M.O. East of Jask to Charbar. 



I. Karachi. Bombay {Ahercrombie). 



SiGARETUS (EuNATICINA) PELLUCIDUS EvB. 



P.G. Kais Island. 14 fathoms, among broken shells and coral, 

 sand. 



SiGARETUS (EuNATIOINA) POMATIELLA MbIv. 



Naticina pomatiella Melv. Mem. Mauch. Soc. vii. p. 62. 

 P.G. Linjah, 3| fathoms. 



I. Bombay {Ahercrombie). 

 Was dredged off Ceylonese coast {Capt. W. A. Tindall). 



Eam. Trichotropid^. 

 Tbichotropis TOwisrsENBi, sp. n. (Plate XXII. fig. 7.) 

 T. testa parva, imperforata, alba, epidermide fuscata coniecta, 

 triplici setarum serie spirali prcedita ; anfractihus 4g, quorum, 

 apicales 1| nitidi, candidi, perlceves, depressi, cceteris arete 

 decussato-cancellatis et alveatis, interstitiis quadratulis, ultimo 

 anfractu usque ad basim alveato, cmteros inagnopere superante; 

 apertura suhquadrata, alba, tenui, ad basim breviter rostrato, 

 truncatulo. 

 Alt. 5, diam. 3*25, sp. maj. 



Hah. P.G. Gulf of Oman, lat. 24° 5' N., long. 57° 35' E., at 205 

 fathoms, mud ; and lat. 25° 31' N., long. 57° 14' E., at 198 fathoms, 

 mud._ Also lat. 25° 14' N., long. 59° 45' E., 80 fathoms. 



It is very interesting to announce the discovery of an Arctic 

 genus^in Indian waters. Though, as seen by the dimensions just 

 given, it is a small species, T. townsendi is one of the most re- 

 markable of the many forms discovered by him whose name it 



