30 ZOOLOGY OF THE VOYAGE OF THE SULPHUR. 



2. Subgenus Sychar. Hinds. 

 Testa elongata ; anfractus rotundati ; apex mamillaris. 



118. Trtphoris vitreus, Hinds, 1. c. p. 19, (Plate VIII. fig. 12.) Testa pellucida; anfractibus 

 quindecem, lasvigatis, rotundatis, lineis duabus elevatis cinctis ; apice mamillari ; apertura subqua- 

 drata ; sinu laterali patulo. 



Inhab. Straits of Malacca. In twenty fathoms, mud. 



One of the elevated lines traverses the whorl about its centre ; the other, 

 not at first very apparent, will be found on its lower surface near the suture. 



3. Subgenus Mastonia. Hinds. 

 Testa acuminata, circa mediam tumida. 



119. Triphoris imlpinus, Hinds, 1. c. p. 19, (Plate VIII. fig. 13.) Testa nigricante ; anfracti- 

 bus quatuordecem, tricarinatis ; carina inferiore albida; apertura rotundata; sinu laterali, subnullo. 



Inhab. New Ireland. Found, together with other small shells, among fine 

 gravel at low water. 



120. Triphoris monilifer, Hinds, 1. c. p. 19, (Plate VIII. fig. 14.) Testa parva, eleganter 

 roonili ; anfractibus decern, biseriatim granulosis; granulis seriei infeiioris albis intervallis rubris, 

 supremse albis ; apertura subquadratS. ; sinu laterali angusto. 



Inhab. Straits of Malacca. In eighteen to twenty-three fathoms, mud. 

 The series of beedings of the upper whorls will be found to be doubled on 

 the last whorl — a circumstance which also occurs in other species. 



121. Triphoris ruber, Hinds, 1. c. p. 19, (Plate VIII. fig. 15.) Testa rufa ; anfractibus un- 

 decem, biseriatim granulosis, seriebus subdistantibus suturam obtegentibus ; apertura rotundata; 

 sinu laterali margine contracta. 



Inhab. New Ireland; very numerous among fine gravel at low water. Straits 

 of Malacca ; in twenty fathoms, mud. 



Its reddish colour and double series of tubercles will readily distinguish this 

 shell. In some of the specimens a small intermediate series is about to make its 

 appearance on the one or two inferior whorls. 



122. Triphoris clemens, Hinds, 1. c. p. 20, (Plate VIII. fig. 16.) Testa, cornea, nitida; an- 

 fractibus quindecem, triseriatim granulosis; serie media parva, ad inferiorem appropinquante, inferiore 

 prominulo-margaritacea ; anfractus ultimi granulis parvis ; sutura sulcata; apertur& rotunda; sinu 

 laterali patulo. 



Inhab. Straits of Malacca. In twenty fathoms, mud. 



