MITRA.— Plate XX. 



Lamarck, Anim. sans vert. (Desliayes edit.),vol.x. p. 339. 

 Varieties. 



Columbella Eebraa, Lamarck. 



Columbella bizonalis, Lamarck. 

 Eab. Esland of Guimaras (found under stones on the coral 



reef's at low water); Cuming. 



It seems curious that Lamarck should have founded two 

 species of Columbella with varieties of this shell, for in his 

 descriptions he specifies the very character which excludes 

 them from the genus; namely, " columella quadriplicatd." 



Species 154. (Mus. Cuming.) 

 MlTEA DECURTATA. Mifr. testa abhreciain-oraid , xidireu- 



tricosd, crassd, solidd, spird brevi, apicem versus acuta ,- 

 laevigata, inferne sulcata ; mgerrimo-fuscd, punctis albi- 

 dk perpaucis prope lasem, linedque alba conspicud in- 

 fra suturas cinctd; columella quadriplicatd ; aperturd 

 ampld; labro superne sinuato et contracto. 



The shortened Mitre. Shell shortly ovate, somewhat 

 ventricose, thick, solid, spire short, sharp towards the 

 apex ; smooth, grooved round the lower pari ; very 

 dark blackish brown, encircled with a few white dots 

 near the base, and a conspicuous white line beneath 

 the sutures ; columella four-plaited; aperture large ; 

 lip sinuated and contracted at the upper part. 



Reeve, Pro. Zool. Soc, is I I . 



Hah. ? 



A tin 



sv species of which I have seen several exam- 

 <cellent state, of preservation. 



Species 155. (Mus. Cuming.) 

 MlTRA TEXTl'RATA. Milr. testa OVato-oblongd, spird brr- 



viusculd, acuminata, transversim crebricostatd, cos/is 

 longitudinaliter impresso-lineatis, interstitus rugoso- 

 cancellatis ; a/tm ferrugineoque variegatd; columella 

 fiavicante, quadriplicatd. 



The interwoven Mitre. Shell ovately oblong, spire 

 rather short, acuminated, transversely closely ribbed, 

 ribs longitudinally impressly lineated, interstices ru- 

 gosely cancellated ; variegated with white and rusty 

 brown ; columella yellowish, four-plaited. 



Lamarck, Anim. sans vert. (Deshayes edit.), vol.x. p. 328. 



Ilab. Island of Tieao, Philippines (found under stones at 

 low water); Cuming. 



\ well-known species, quite distinct from any other of 



Species 150. (Mus. Cuming.) 



MlTRA PLVMBEA. Mifr. testa aen udl nalu-ia-atd ', liTri, lli- 



tidd, bail suhobsoleti sulcata; ceerulescente-plumbed, 

 apicem versus fuscescewte; columella quadriplicatd, 

 plied infimd subindistinctd ; labro subeffuso. 

 The lead-colour Mitre. Shell aenminately ovate, 

 smooth, rather obsoletely grooved at the base ; blueish 

 lead colour, brown towards the apex; columella four- 

 plaited, lowest plait rather indistinct; lip slightly 



Lamarck, Anim. sans vert. (Deshayes edit.), vol. x. p. 339. 

 Hob. Mediterranean. 



Several very characteristic examples of this species have 

 been dredged by Professor Forbes at various depths in the 

 Mediterranean. 



Species 157. (Mus. Cuming.) 



Mitra badia. Mitr. testa aeuminato-ovatd, trt 



subtilissime striata ,■ undique badid .• columella quadri- 

 plicatd, /died infimd subobscurd; aperturd brewusculd. 



The dark brown Mitre. Shell aenminately ovate, 

 transversely very finely striated ; dark brown through- 

 out ; columella four-plaited, lowest plait somewhat 

 obscure ; aperture rather short. 



Reeve, Pro. Zool. Soc, 1844. 



Uab. ? 



This is rather an unsatisfactory species, though certainly 

 not referable to any hitherto described. 



Species 158. (Mus. Cuming.) 

 Mitra acuminata. Mitr. testa ovato-obhngd, crassius- 

 culd, solidd, spird acute acuminata, kevigatd, anfractibus 



pn 



luted, epidermide tenui 



da/a'; columella quadriplicatd ; aperturd alba; labro 

 incrassato, contracto, intus subgibboso. 



The acuminated Mitre. Shell ovately oblong, rather 

 thick, solid, spire sharply acuminated, smooth, first 

 few whorls very finely striated ; yellow, covered with 

 a slight epidermis; columella four-plaited; aperture 

 white; lip thickened, contracted, rather gibbous in- 

 teriorly. 

 Swainson, Zool. Illus., 2nd Scries, pi. 128. 



Mitra lutea, Quoy. 

 Eab. Lie of Annaa and Philippine Islands (found under 

 stones at low water); Cuming. 

 Mr. Swainson described this shell under the above title 

 long before its discovery by M. Quoy. In young specimens, 

 such as that represented in the /.oology of the 'Voyage de 

 1' Astrolabe,' the spire is more delicately acuminated. 



