PURPURA.— Plate V. 



inwards, transversely ribbed throughout, ribs promi- 

 nent, rugose, obsoletely squamate, interstices deeply 

 excavated, striated, with rarely a small intervening 

 rib ; dull yellowish white. 

 Bucclnimi succiiictum, Martyn, Univ. Conch, vol. 2. 



pi. 45. 

 Bucciuum orhlta, Chemnitz. 

 Biiccinuni lacmiosmn, Bruguiere. 

 Buccinum bicostatum, Bruguiere. 



Variety /3. 

 Testa parva, elongatior, costarum inferstitiis laminis tenuibm 



pecuUariter deciissatis. 

 Shell small, more elongated, with the interstices between 



the ribs peculiarly crossed ^rith thin laminae. 



Buccinum striatum, Martyn. 



Purpura rugosa^ Lamarck. 



Purpura striata, Deshayes. 

 Hah. Cape of Good Hope. 



The Purpura rugosa, Lamarck, of which M. Kiener has 

 omitted mention, is, I think, without doubt, a modified 

 state of the P. snccincta, the extremes of which are beau- 

 tifully represented by Martyn, in the ' Universal Concho- 



logy-' 



Species 24. (Mus. Cuming.) 

 PUEPUEAXANTHOSTOMA. Purp. testa prjriformi-ovatd, tm- 



tricosd, liasi subelongatd et recurvd, anfractibiis superne 

 angulatis, ad. unguium plus minusve tuberculiferis, lou- 

 gitudinaliter obtuse plicato-costatis, transversim subti- 

 liter costatis, costis angustis, suhdidantibm, interstitils 

 lirk minutis, vel obsolete, vel coiispicue squamatis, cre- 

 berrime cingulatis, labro sapissiiiie tutus denticulato ; 

 alba, columella et apertures foMce lutescente-lacteis. 

 The yellow-mouth Purpura. Shell pyriformly ovate, 

 ventricose, rather elongated and recurved at the base, 

 whorls angidated at the upper part, more or less tu- 

 bercled at the angle, longitudinally obtusely plicately 

 ribbed, transversely finely ribbed, ribs naiTOw, rather 

 distant, interstices closely encircled with minute ridges 

 sometimes obsoletely, sometimes conspicuously scaled, 

 lip frequently denticidated within ; white, cohmiella 

 and interior of the aperture yellowish cream colom-. 

 Brodekip, Pro. Zool. Soc, 1833. 



Hab. Valpai-aiso (dredged from gravel and sand at various 

 depths, fi-om seven to twenty-five fathoms) ; Cuming. 

 This is a most variable species both in form and sculp- 

 ture, and might be referred in its different states, with the 

 same propriety, either to the genera Pyrula or Fusus. 

 However unlikely it may appear, an affinity may certainly 

 be traced to the Fusm squamulosus of Philippi, inhabiting 

 the Mediterranean, the Purpura xantliostoma m a yoimg and 

 highly sculptiu-ed condition, being of exactly similar form, 

 and almost as thickly beset with imbricating scales. 



