4Jj^ Zooloffical Society. 



transversim sulcata ; labia cum callo mediocri tecto, margine acuta 

 producta ; labro margine suhcrenulato, intus lirato ; columella an- 

 tice triplicatd. 

 Hab. Batangas, island of Luzon, 21 fathoms, coarse sand (//. C). 

 Mus. Cuming. 



10. Nassa PLiCATELLA, A. Adams. N.testd ovato-conicd.fuhd; 

 labro albido ; anfractibiis subrotundatis longitudinaliter plicatis 

 transversim liratis, liris ad plicas nadulosis ; labia cum callo me- 

 diocri ; calumelld antice uniplicatd ; labra margine acuta, intus 

 lirato. 



Hab. Wallwich Bay, Africa. Mus. Cuming. 



Subgenus Tritonella, Adams ; Tritonin, Fleming. 



Shell turrited, cancellated ; aperture rounded, not produced into 

 an anterior canal ; outer lip not dentate, with a marginal rarix. 



1. Nassa fuscata, A. Adams. N. testd ovatd, spird acumi- 

 natd, anfractibus convexiusculis, fused, longitudinaliter plicatd, 

 transversim liratd, plicis ad liras tuberculatis, interstitiis trans- 

 versim striatis ; calumelld rugosd ; labro postice sinuata, intus 

 dentato-lirato. 



Hab. 1 Mus. Cuming. 



Subgenus Tritia, Risso. 



Shell turrited ; inner lip spreading ; outer lip not dentate, without 

 a marginal varix. 



1. Nassa dealbata, A. Adams. A^. testd avato-conicd, acumi- 

 natd, subturritd, albidd, fascid pallidd luted cinctd ; anfractibus 

 planulatis longitudinaliter plicatis, plicis ?iodulosis, transversim 

 liratis ; columella tuberculata-dentatd ; labro extus incrassata, 

 intus dentato-lirato. 



Hab. Dumaguete, isle of Negros, 11 fathoms, black coarse sand 

 (H. C). Mus. Cuming. 



2. Nassa costellifera, A. Adams. N. testd ovata-conicd, 

 acuminatd, albidd, fusca-variegatd, fascid fused in ultima an- 



fractu longitudinaliter costulatd, transversim liratd; costellis 

 nodulosis ; anfractibus planiusculis ; labia transversim carrugato- 

 plicato ; labro intus lirato. 

 Hab. Curimas. Mus. Cuming. 



3. Nassa trifasciata, A. xldams. N. testd ovato-acuminatd ; 

 spird acutd, productd, pallide cariilescente aut albidd, fasciis tri- 

 bus transversis rufis ornatd, longitudinaliter subplicatd, transver- 

 sim sulcutd ; cohimelld Icevi, callo cum nitida expanso tecto ; labro 

 margine acuta, intus lirato. 



Hab. Vigo Bay {M' Andrew). Mus. Cuming. 



Subgenus Desmoulea, Gray. bil/l A\nV; 



Shell subglobose, covered with a downy epidenuis ; spire short ; 

 apex papillary. 



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