Zoological Society. 269 



which is worthy of observation ; above the brown band it is very 

 closely impressly striated across; below it, it is merely distantly 

 grooved. A difference between the transverse sculpture of the upper 

 and lower portions of the whorls is rarely met with. 



MiTRA PECULiARis. Mitv. tcstd clougatd, anfractihus lavibus, con' 

 cavis, carind unicd prominente superni ornatis ; albidd,fascid latd 

 luteo-fuscescente cingulatd ; columella biplicatd. 

 Conch. Icon., Mitra, pi. 36. f. 305. 



Hab. Puerto Galero, island of Mindoro, Philippines (found under 

 stones at low water) ; Cuming. 



This species may be easily distinguished by the hollow character 

 which is imparted to the whorls by the very prominent keel round 

 the upper part. 



MiTRA ROBOREA. Mitr. tcstd pyramidalt, spird acuminatd; nigri" 

 cante-fuscd, liris albidis angustis undique funiculatd ; columelld 

 biplicatd, plicis subindistinctis ; aperturd parvd. 



Conch. Icon., Miira, pi. 37. f. 306. 



Hab. ? 



An interesting dark pyramidal shell, encircled throughout with 

 white cord-like ridges. 



MiTRA RADIUS. Mitr. testd gracili-fusiformi, spird acuminatd, bad 



contractd, subelongatd ; anfractibus longitudinaliter concentric"^ 



plicato-costatis, interstitiis cancellatis ; pallid'^ earned, anfractu uU 



timofascidfuscescente basim versus cingulato ; columelld biplicatd. 



Conch. Icon., Mitra, pi. 37. f. 309. 



Hab. Island of Corregidor, Philippines (found among coarse sand 

 iit the depth of seven fathoms) ; Cuming. 



A light elegant shell, in which the ribs are of a peculiarly concen- 

 tric growth. 



MiTRA GLANDiFORMis. Mitr. tcstd ovatd, utrinquc attenuatd, spira 

 suturis profunde impressis ; longitudinaliter costatd, costis lavibus, 

 interstitiis profunde clathratis ; cinereo-griseo alboque variegatd, 

 bast albicante ; columelld quadriplicatd. 



Conch. Icon., Mitra, pi. 37. f. 310. 



Hab. } 



In most examples of this species the white rather predominates. 



Mitra cineracea. Mitr. testd pyramidali-ovatd, spird turritd, 

 basi subrecurvd; anfractibus superne angulatis, longitudinaliter 

 costatis, costis ad angulum subnodosis, interstitiis liris parvis 

 transversis cancellatis; cinereo-grised, fascid albidd subinterruptd 

 cingulatd, basi albidd ; columelld quadriplicatd, aperturd parvd. 



Conch. Icon., Mitra, pi. 37. f. 311. 



Hab. Cagayan, province of Misamis, island of Mindanao, Philip- 

 pines (found under stones at low water) ; Cuming. 



A sharply turreted shell, in which the prominent parts of the ribs 

 are white upon a dark ashy ground. 



Mitra limata. Mitr. testd ovatd, crassiusculd, spird mediocri ; 

 Icevigatd, politd, transversim undique sulcatd, sulcis puncturatis ; 



