C E R I T H I U ]VI . 



Plate XX. 



Species 141. (Mus. Cuming.) 



Ceritiiium placiduji. Ceritlt. testa, pa7-vu, coniecl, alba, 

 llris gpiralibiis scabris cinctd, interstit'ds p7'ofmidis, 

 scabris ; anfractibus reef is, sutiira excavata ; apertiird 

 subtrigonn, labro angulato, columella angustd, siib- 

 torluosd, acuta, canali breiiissimo. 



The placid Cerithium. Shell small, conical, white, 

 girt with rough spiral ridges, interstices deep, rough ; 

 whorls straiglit, suture excavated ; aperture subtri- 

 gonal, outer lip angular, columella narrow, slightly 

 turned, pointed, canal very short. 



Gould, Otia, p. 141. 



Hab. China Seas. 



Species 142. (Fig. a, b, Mus. Cuming.) 



Cerithium alutacehm. Cerilli. tesld parvd,fulvd, sub- 

 ovatd, acuminata, longitudlnaliter plicaid, pUcis va- 

 lidis, trituberculatis, ttibercuUs maguis, interstitiis 

 profundi fovealis, suiiirdprofundd; ultimo anfractu 

 liris moiiiliformibus, rubro-punctatis cincto ; aperturd 

 ovali, canali brevi, columella torluosd. 



The leathern Cerithidm. Shell small, brown, rather 

 oval, pointed, longitudinally plaited, plaits strong, 

 three-tubercled, tubercles large, interstices deeply 

 pitted, suture deep ; last whorl girt with beaded, red- 

 spotted ridges ; aperture ovate, canal short, columella 

 tortuous. 



GoLLD, Otia {Bittium). 



Hab. China Seas. 



Species 143. (Mus. Cuming.) 



Cerithium rhodostoma. Cerith. testa solidd, pyrami- 

 data, pallidifulvd, ad aperturam et apicem roseo tincto ; 

 anfractibus octo, longitudiualiter plicatis, spiraliter 

 triseriatim super plicas noduUferis, ad interstitia li- 

 ratis, infra ventricosis, ultimo paululum coniracto ; 

 aperturd subquadratd, columelld laminatd, crassd, 

 truncald, canali reflexo, labro creuulato, fasciato. 



The square-mouthed Ckrithium. Shell solid, pyra- 

 midal, pale-brown, tinged with pink at the tip and 

 aperture ; whorls eight, longitudinally plaited, with 



tliree spiral rows of nodules upon the plaits and 

 ridges in the interstices, ventricose below, the last a 

 little contracted ; aperture rather square, columella 

 laminar, thick, trimcated, canal reflected, outer lip 

 crenulated, banded. 



A. Adams, Sowerby, Thes. Conch. Cerithium, sp. 49.f.lU3. 



Hab. Van Diemen's Land. 



This little shell rather resembles an elongated Nassa 

 in form. It is solid, plicated, and the whorls rather bulge 

 at the lower part, the last being somewhat contracted in 

 proportion to the last but one. 



Species 144. (Mus. Cuming.) 



Cerithium pauxillum. Cerith. testa parvd,pyramidatd, 

 subcylindricd, pallide fulvd, longitudinaliter plicatd ; 

 anfractibus brevibus, prominentibus, spiraliter costatis, 

 super plicas noduUferis, siiturd excavata; aperturd 

 lateraliter productd, labro valde expanse, columelld 

 tortuosd, canali valido, truncate. 



The puny Cerithium. Shell small, pyramidal, subey- 

 lindrical, pale-fulvous, longitudinally plaited ; whorls 

 short, prominent, spirally ribbed, noduliferous upon 

 the ribs, suture hollow ; aperture produced laterally, 

 outer lip expanded, columella tortuous, canal distinct, 

 truncated. 



A. Adams, Sowerby's Thes. Conch. Cerithium, sp. 178, 

 f. 294. 



Hab. Island of Bureas, Philippines ; Cuming. 



Species 145. (Mus. Cuming.) 



Cerithium Algerianum. Cerith. testa oblongd, albd, 

 turritd; anfractibus numerosis, triserialiiii tubercu- 

 latis, siibventricosis ; aperturd subovali, labro producto, 

 tenui, columelld brevi, canali brevissimo. 



The Algerian Cerithium. Shell oblong, white, tur- 

 reted; whorls numerous, tubercled iu three rows, 

 ventricose; aperture rather oval, outer lip produced, 

 thin, columella short, canal very short. 



Sowerby, Thes. Conch. Cerithium, sp. 130. f. 230, 231. 



Hab. Algeria. 



December, 1865. 



