MITRA.— Plate IV. 



somewhat ventricose structure, consists in its being en- 

 circled with impressed brown lines, which are not punc- 

 tured as Lamarck describes, although they obtain a cer- 

 tain likeness of that character from the crossing of the 

 longitudinal stria?. According to Solandcr's manuscript 

 it is the Volvta ruffina of Linnaeus, but as this is ex- 

 tremely doubtful I have not ventured to adopt the name. 



Species 26. (Mus. Norris.) 



Mitra cabdinalis. Mitr. testd ovatd, spini breviusculd, 

 acuminata, anfractu ultimo maxima, ventrkoso ; 

 transversim impresso-striatd, striis subtilissime punc- 

 turatis; albidd, carulescente interdum pallide nebu- 

 losd, maculis castaneo-spadiceis irregularibus seria- 

 tim cinctis ; columella quinqueplicatd. 



The cardinal Mitre. Shell ovate, spire rather short, 

 acuminated, last whorl very large, ventricose ; trans- 

 versely impressly striated, stria; very finely punc- 

 tured ; white, sometimes very faintly clouded with 

 a blueish tint, encircled with rows of chestnut- 

 bay spots ; columella five-plaited. 



GRONovius.Zoophylacium, Part III. No. 1326 and 1327. 

 Pileus cardinalitius, Seba. 

 Valuta cardinalis, Gmelin. 

 Mitra pertusa, Swainson. 



Hab. Ceylon. 



The Mitra cardinalis, adusta, and millepora have each 

 been referred by authors to the Valuta pertusa of Lin- 

 nreus; as it therefore cannot be satisfactorily identified, 

 I think Lamarck was fully justified in adopting Grono- 

 vius*s name and banishing that of pertusa from the no- 

 menclature. The Mitra cardinalis was moreover long 

 known to ancient writers as the ' Cardinal's Hat.' 



Species 27. (Mus. Cuming.) 



Mitra gigantea. Mitr. testd elongato-turritd, spini 



productd, suturis profundi impresses ; anfractibus 



cylindraceo-extensis, costis angustis elevatis, stria 



tinted elevatd in anfractu ultimo inter currente, undi- 



que annulatim cinctis ; lacted, epidermide corned ni- 

 gerrimd indutd ; columella quadriplicatd. 



The gigantic Mitre. Shell elongately turreted, spire 

 produced, sutures deeply impressed ; whorls cylin- 

 drically extended, encircled after the manner of 

 rings, with narrow elevated ribs, having a single 

 raised stria running between them on the last 

 whorl ; cream-colour, covered with a very black 

 horny epidermis ; columella four-plaited. 

 Swainson, MSS. 



Hah. Xipixapi, West Columbia (found in sandy mud at 

 the depth of seven fathoms) ; Cuming. 

 This fine species may be recognised by the narrow 

 elevated character of the ribs, which give it the appear- 

 ance of being encircled with rings. 



Species 28. (Mus. Cuming.) 



Mitra ferruginea. Mitr. testd oblongo-ovatd, spird 

 acuminata, transversim undiquc crebricostatd, costis 

 rotundatis, interstitiis sulcatis ; albidd, aurantio- et 

 ferrugineo-fusco strigatd et maculatd ; columelld quin- 

 queplicatd ; aperture fauce aurantid ; labro fortiter 

 crenato. 

 The rusty Mitre. Shell oblong-ovate, spire acumi- 

 nated, transversely very closely ribbed throughout, 

 ribs rounded, interstices grooved ; whitish, streaked 

 and spotted with orange and rusty brown ; colu- 

 mella five-plaited ; interior of the aperture orange ; 

 lip strongly crenated. 

 Lamarck, Anim. sans vert., vol. vii. p. 303. 



Mitra ritulina, Dillwyn. 

 Hab. Islands of Annaa and Taheite, Pacific Ocean (found 

 under coral on the reefs at low water) ; Cuming. 

 The Mitra abbatis of Chemnitz, for which see Plate 

 XIII., is not a variety of the Mitra ferruginea , as La- 

 marck supposed, but a very characteristic species, nei- 

 ther ribbed nor grooved, figured subsequently by Swain- 

 son under the name of Mitra contractu ; and M. Kiener 

 in adding to this chapter of accidents has erroneously 

 illustrated the species, with that erroneous name, by a 

 worn specimen of the Mitra chrysostoma. 



