133 



ptaniusculis, trunsversim subsulcaiis ; columelld plicis quinque ; 

 labro intus rufo. 

 Hub. Philippines. 



Several specimens of this species, all agreeing in form, were col- 

 lected by Mr. Cuming ; but one only retained the natural colour of 

 the surface. 



7. MiTRA TiARELLA, A. Adams. M. testd oblongo-ovatd, fused, 

 nodulis albis, ad suturas coronatd, longitudinaliter subplicatd, 

 transversim liratd, interstitiis valde punctatis ; columelld plicis 

 quatuor ; labro margine crenulato. 



Hub. Island of Ticao, sandy mud, 6 fathoms. 

 This small, brown-coloured species is beautifully crowned, in adult 

 specimens, with a diadem of white nodules at the suture of the whorls. 



8. MiTRA PiGRA, A. Adams. M. testd oblotigo-fusiformi, ob- 

 scuro-fuscd, lineis pallidulis transversis prope suturas, albidd, 

 maculis rufis, ornatd ; Icevi; spird acuminatd ; anfractibus sep- 

 tem, planulatis ; aperturd subdilatatd, intus albd ; columelld pli- 

 cis quatuor, albis, obliquis, instructd, antice subintortd. 



Hah. Australia. 



This species partakes somewhat of the character of M. sacerdo- 

 talis. 



9. MiTRA LUCTUOSA, A. Adams. M. testd oblongo-fusiformi, 

 obscuro-fuscd, fascid unicd pallidd transversd ornatd ; spird 

 acutd, anfractibus planulatis, transversim liratd ; interstitiis 

 valde clathrato-punctatis ; aperturd oblongo-ovatd; spird brc- 

 viori ; labio crassiusculo ; columelld plicis quatuor salientibus. 



Hub. China Seas. 



This species was obtained during the voyage of II. M.S. Samarang. 



10. MiTRA INSCULPTA, A. Adams. M. testd ovato-fusiformi ; 

 spird brevi, acutd; aperturd breviori; anfractibus planulatis, 

 pallide fused, maculis rufis, longitudinalibus, variegatd ; cingillis 

 integris, acutis, j)rominentibus, eequidistantibus ; liris intermediis 

 submoniliformibus ; interstitiis longitudinaliter valdi sulcatis ; 

 aperturd elongatd; columelld plicis tribus ; labro acuta margine 

 crenulato. 



Hah. Ceylon (Br. Gardner). 



This species also belongs to the same group as M. cingulata. 



1 1 . MiTRA EXARATA, A. Adams. M. testd ovato-fusiformi ; spird 

 aperturam cequante ; anfractibus subrotundis ; suturd subcanalicu- 

 latd, olivaced, fasciis duabus pallidis transversis, longitudinaliter 

 costatd ; costellis cequalibus, subdistantibus ; interstitiis lineis in- 

 sculptis, profundis, transversis ; columelld plicis tribus, validis, 

 instructd. 



Hah. Bais, island of Negros, coarse sand, 7 fathoms. 

 The most characteristic feature of this species is the sculpture be- 

 tween the ribs, consisting of deep, engraved, transverse lines. 



