CERITHIUM.— Plate V. 



cannli aiitico breviiesculo, labro incrassaio, castaneo 

 prope marginem fasciato. 



The mdch-striated Cerithium. Shell rather long, 

 blackish-grey, with numerous white varices, minutely 

 striated spirally, the alternate striae beaded, whorls 

 rather angular, the nodules at the angle and at 

 the suture rather larger, aperture oval, contracted 

 posteriorly, anterior canal rather short, outer lip 

 thickened, banded with chestnut near the margin. 



SowERBY, Thes. Conch. Cerithium sp. 30. 



Hab. ? 



Species 32. (Mus. Cuming.) 



Cerithidm atrathm. Cmih. testa turritd, pyramidatd, 

 nigra, varicibus albescentibus, spiraliter striata,, sfriis 

 siibgrauosis, anfractibus graduatis, aiigulatis, ad an- 

 gidum tuberculis pliciformibiis sitbacutis cinctis, su- 

 perne subexcavatis, ad suturam iumidis cnnulatis, 

 aperturd cariiled, columella brevi, canali brevi, labro 

 expanse, ad marginem crenulato. 



The black Cerithium. Shell turreted, pyramidal, 

 black, with vvhitish varices, spirally striated, striae 

 granulated, whorls graduated, angular, circled with 

 plait-like rather sharp tubercles, slightly excavated 

 above the angle, swelled and crenulated at the suture, 

 aperture blue, columella short, canal short, outer lip 

 expanded, crenulated at the margin. 



Born, Mus. Cses. p. 321. t. 11. f. 17, 18. 



Hab. Sicily. 



A stout, solid, pyramidal form, of very dark colour. 

 The name has sometimes been applied to the more lightly 

 and irregidarly formed shell named C. caiedatiis by Mr. 

 Sowerby, but this is doubtless the true shell of Born. 



Species 33. (Fig. a, b, Mus. Cuming.) 



Cerithium patulum. Cerith. testa brevi, ventricosd, ir- 

 regulariter varicosd, fused, unfractibus lungitudinali- 

 ter plicatis, costis diiabus spiralibus validis iubercnli- 

 feris cinctis, ultimo magna, distorto, varicose, aperturd 

 expansd, canali rectinsculo, labro crasso, patulo, intus 

 crenato. 



The patulous Cerithium. Shell short, ventricose, 

 irregularly varicose, brown, whorls longitudinally pli- 

 cated, encircled with two strong tuberculated spiral 

 ribs, last whorl large, distorted, varicose, upertnre ex- 

 panded, canal rather straight, outer lip thickened, 

 patulous, crenulated within. 



Sowerby, Thes. Conch. Cerithium sp. 97. 



Hab. Island of Panay, Philippines ; Cuming. 



Tills species is remarkable for the expanded outer lip of 

 the aperture. 



Species 3i. (Mus. Cuming.) 



Cerithum bifasciatim. Cerith. testa breviusculd, .io- 

 lidd, striata, alba, fasciis latis ca.sta>/eis cincld, oii- 

 fractibns pa/icis, in seriebus tribiis tuberculatis, nltimo 

 bifasciato, seriebus tuberculorum iie.v sculptd, aperturd 

 brevi, canali brevi, labro crasso, crenulato. 



The double-banded Cerithium. Shell rather short, 

 solid, striated, white, encircled with broad chestnut 

 bands, whorls few, tuberculated in three vows, the 

 last with two bands and six rows of tubercles, aper- 

 ture short, canal short, outer lip thick, crenulated. 



Sowerby, Thes. Conch. Cerithium sp. 110. 



ffab. St. Nicholas, Island of Zebu, Philippines ; Cuming. 



Shorter and thicker than C. lemuiscatum, and having the 

 tubercles rounded, instead of being sharply angular, as in 

 I that species. 



