478 Zoological Society. 



of this unique shell by a lithographed figure, it being so fine that 

 the interstices of the net- work resemble minute punctures. 



MiTRA Dennisoni, Mitv. testdfusiformi, spird attenuato-acumi- 

 natd, anfractibus subconcentrice costatis, transversim sulcatis, 

 sulcis angustis y castas super plus minusve obsoletis ; rubido-auran- 

 tid, zond unicd albidd cingulatd, ccerulescente-olivaceo inter castas 

 peculiariter tinctd ; columelld quadriplicatd. 

 Conch. Icon., Mitra, pi. 3. f. 14. 



Hab. Puteao, province of Albay, island of Luzon, Philippines (found 

 on mud-banks at low water) ; Cuming. 



I dedicate this fine species with much pleasure, at the particular 

 request of Mr. Cuming, to J. Dennison, Esq., a gentleman who has 

 acquired considerable fame in the conchological world on account of 

 the very choice and select character of his collection of shells. 



Mitra floccata. Mitr. testd elongato-ovatd, crassiusculd, Icevigatd, 

 punctorum seriebus undique cinctd ; lutescente-spadiced, albo longi- 

 tudinaliter floccatd ; columelld quadriplicatd, labro prope basin 

 crenato. 

 Conch. Icon., Mitra, pi. 3. f. 16. 



Hab, ? 



The specimen here figured, from the collection of Mr. Cuming, is 

 the only one of the species I am acquainted with. 



Mitra solid a. Mitr. testd ovato-elongatd, crassd, solidd, spird 

 subturritd ; anfractibus numerosis, convexis, Icevigatis, transversim 

 sulcatis, sulcis angustis, striis subtilissimis prope suturas decus- 

 satis ; spadiceo-fulvd, albo sparsim et irregulariter floccatd ; colu- 

 melld quinqueplicatd. 



Conch. Icon., Mitra, pi. 3. f. 18. 



Hab. ? 



This interesting species may be recognized by its many convex, 

 deep-sutured whorls ; and the whorls, being longitudinally striated 

 near the sutures, exhibit a slight cancellated appearance. 



Mitra inquinata. Mitr. testd fusiformi-oblongd, subangustd, 

 spird acuminatd, transversim impresso-striatd, striis puncturatis ; 

 eburned,rubido-fusco longitudinaliter inquinatd ; columelld quadri- 

 plicatd. 



Conch. Icon., Mitra, pi. 5. f. 29. 



Hab. ? 



Though a species of very simple character, it is quite distinct from 

 any hitherto described. 



Mitra gracilis. Mitr. testd elongatd, spird valde productd, suturis 

 subprofundis ; anfractibus transversim subtilissime costatis, costis 

 angustis irregularibus, interstitiis liris obtusis minutissimis pul- 

 cherrime decussatis ; albidd, fuscescente pallide fasciatd, costis 

 fusco articulatis ; columelld quadriplicatd. 



Conch. Icon., Mitra, pi. 5. f. 31. 



Hab. Island of Ticao, Philippines (found in sandy mud at the depth 

 of six fathoms) ; Cuming. 



