C E R I T H I U M 



Plate VI. 



Species 35. (Fig, a, b, c, Mus. Cuming.) 



CIekithium eburneum. Gerith. testa turritd, elongatu, 

 acuminatd, alba, plerumque mnculis nifo-fuscis sen 

 nigrescentibus irregulariter variegatd, varicibus irre- 

 gidar'tbus, albis, ayifractibus medio angvlatis, liibercu- 

 lormn, seriehiis tribits chiclis, tuberculh ad angulmn 

 acutangulatis, ad suturam subrotundatis, aperturd 

 subroliiiidd, canali brevinsculo, labro crasso, siibexpanso. 

 .The ivory Cerithium. Shell turreted, elongated, acu- 

 minated, white, generally variegated with irregular 

 spots (or patches) of reddish-brown or lilackish, 

 varices irregular, white, whorls angular in the mid- 

 dle, encircled with three rows of tubercles, tubercles 

 acute at the angle rather rounded at the suture, aper- 

 ture rather rounded, canal rather short, outer lip 

 thick, rather expanded. 



BiiUGUiERE, Enc. Meth. n. 41. 



Cerithium algicola, C. B. Adams. 



Hnb. .Jamaica. 



This prett\' species is subject to great variations in co- 

 lourina;. 



Species 36. (Mus. Cuuiing.) 



Cerithium purpurascens. Cerith. testa brevi, ventri- 

 cosd, conicd, palUde purpurea, tuberculis acutis rubro- 

 maculatis seriatim cinctd, varicibus albis, anfractibus 

 angulatis, aperturd ovali, canali longiusculo, labro 

 sube.vpanso, iutus cremdato. 



The purplish Cerithium. Shell short, vent.ricose, 

 conical, pale-purple, with sharp tubercles coloured 

 with reddish-brown spots, varices wliite, whorls an- 

 gulated, aperture oval, canal rathei- long, outer lip 

 rather expanded, crenulated within. 



SowERBY, Thes. Conch. Cerithium sp. 99. 



Hab. Philippines ; Cuming. 



The shell figured may be regarded as the type of a spe- 

 cies which presents many varieties of colouring. 



Species 37. (Fig. «, b, Mus. Cuming.) 



Cerithium Sandvichense. Cerith. testd breviusculd 

 ventricosd, alba, spiraliter tenniler liratd, longitudina- 

 liter plicis rotuudis validis costaid, anfractibus novem 



subventricosis , ultimo subovali, subrostrato, aperturd 

 ovatd, canali brevi, labro recnrvo. 



The Sandwich-Islant) Cerithium. Shell rather short, 

 ventricose, white, spirally lirated, longitudinally 

 ribbed with strong rounded plaits, whorls nine, ratlier 

 ventricose, the last rather oval, produced into a beak, 

 aperture oval, canal short, outer lip turned inwards. 



Sowerby. 



Hab. Sandwich Islands. 



The only specimen we have of this ventricose white 

 shell is not fully formed in the aperture, being incomplete. 



Species 38. (Fig. a, h, Mus. Cuming.) 



Cerithium semiperrugineum. Cerith. testa brevius- 

 culd, ventricosd, alba, macuUs magnis et punctis fer- 

 rvgitieis irregulariter pictd, spiraliter striatd, anfrac- 

 tibus paucis, superne angulatis, ad angulum tuberculis 

 magnis, subacutis, et infra prope suturam tuberculis 

 minoribus armatis, ultimo magno^ seriatim tuberculato, 

 aperturd magna, superne contractd, canali mediocri, 

 subrecurvo, labro expanso, subquadrato. 



The iron-painted Cerithium. Shell rather short, 

 ventricose, white, irregularly painted with large spots 

 and dots of a ferrugineous colour, spirally striated, 

 whorls few, angular above, armed at the angle with 

 large rather sharp tubercles and near the suture with 

 smaller ones, last whorl large, with rows of tubercles, 

 aperture large, narrowed above, caual middle-sized, 

 slightly recurved, outer lip expanded, rather square. 



Lam.A-RCK, Anira. sans vert. 



Cerithium tuberciihitum, Sowerby. 



Hab. West Indies. 



Very similar in form to C. litteratum, but it is smoother 

 between the ridges, and the colouring is laid on in irregu- 

 lar patches. 



Species 39. (Mus. Cuming.) 



Cerithium fenestratum. Cerith. testa pyramidatd, 

 acuminatd, alba, varicosd, anfractibus longitudinaliter 

 plicalis, et costeUis acutis spiralibus cancellatis, in- 

 terstitiis castaneis, aperturd rotundd, labro crasso, 

 inlus crenato. 



October, 1 865. 



