C E R I T H I U M . 



Plate XL 



Species 71. (Fig. a, b, Mus. Cuming.) 



(/ERITHICM TENELLU-M. Ceritli. lestd tenui, mhdiapliand, 

 alba vel rosed, noiumiiquam maciiUis cantuiwis parvis 

 seriatim pictd, varicibiis albis, anfractibus supra me- 

 dium angulatis, supra anyuluin. excavatis, ad unguium 

 et suturam tuberculaiis, aperturd parvd, caiiali breci, 

 aperlo, labro simplice. 



The delicate Cerithium. Sliell tliiii, nearly transpa- 

 rent, white or rose, sometimes painted with rows of 

 small chestnut spots, varices white, whorls angulated 

 above the middle, excavated above the angle, tuber- 

 culated on the angle and at the suture, aperture small, 

 canal short, open, outer lip simple, 



SowEKBY, Thes. Conch. Cerithium sp. 3-I-. 



Hab. Philippines ; Cuming. 



There is a lightness and transparency in the variously 

 coloured shells of this species that, with other characters, 

 distinguish them at first sight. 



Species 72. (Fig. a, b, Mus. Cmniug.) 



Cerithium balteatUaM. Ceritli. tesld turritd, acmniuald, 

 alba, lined rubrd vel fascia luted spiraliter cinctd, va- 

 ricibns frequeiilibus, albis, anfractibus longitudinaliter 

 pUcatis, tuberculaiis, snperne tumidis, prope suturam 

 subcontractis, ultimo valide bicostatd, infra castas at- 

 tenuatd, aperturd subquadratd, canali produclu, sub- 

 ape r to. 



The belted Cerithium. Shell tnrreted, acuminated, 

 white, spirally encircled by a red line or yellow band, 

 varices numerous, white, whorls longitudinally ribbed, 

 tuberculated, swelled above, narrowed near the suture, 

 the last with two strong ribs, narrowed below the ribs, 

 aperture rather square, canal produced, rather open. 



PliiLU'Pi, Abbildungen, t. 1. f. 10. 



Hab. Philippines ; Cuming. 



The last whorl terminates below in a couple of ribs, 

 beneath which the lower part of the shell is narrowed so as 

 to form a kind of rostrum. 



rectiusculis, costis spirultbus luberculijeris tribus (an- 

 fractu ultimo pluribusj cinctis, tuberculis albu-punctu- 

 tis, anfractu idtimo producto, ovali, aperturd ovali, 

 sube.vpansd, canali producto, aperlo. 



The granular Cerithium. Shell blackish-grey, ta- 

 pering, acuminated, spirally striated, whorls rather 

 straight, girt with three (more in the last whorl) 

 spiral tubercidated ribs, tubercles white-spotted, last 

 whorl produced, oval, aperture oval, rather expanded, 

 canal produced, rather open. 



Kieneb, Sp. de Coq. Cerithium, pi. \. f. 3. 



Hab. Australia. 



The tubercles are not so sharp antl narrow in this spe- 

 cies as in C. robur, and the canal shorter and more open. 



Species 73. (Mus. Cuming.) 



Cerithium granosum. Ceritli. lestd griseo-nlgresceute, 

 pyramidatd, acuminatd, spiraliter striatd, anfractibus 



Species 74. (Mus. Cuming.) 



Cerithium mitr.eforme. Ceril/i. lestd pyramidatd, 

 fusco-nigrescente, varicibus albis, prope suturam spira- 

 liter albo fasciald, anfractibus rectiusculis, longitudi- 

 naliter plicatis, in seriebus tribus fsupremd duplicatd) 

 tuberculatis, tuberculis parvis, rotundis, albis, ultimo 

 anfractu versus basin elongate, angustato, aperturd 

 ovali, canali producto, labro lineis albis radiato. 



The mitke Cerithium. Shell tapering, blackish-brown, 

 with white varices, spirally banded with white near 

 the suture, whoris rather straight, longitudinally pli- 

 cated, tuberculated in three rows, the uppermost 

 double, tubercles small, white, round, last whori 

 towards the lower part long and narrow, aperture 

 oval, canal produced, open. 



SowEUBY, Thes. Conch. Cerithium sp. 104.. 



Hab. ? 



In this species the last whori is obliquely conlracted. 



Species 75. (Mus. Cuming.) 



Cerithium rubus. Ceritli. tesld elongatd, pyramidatd, 

 varicosd, fusco-purpurascente, varicibus frequentibus, 

 tumidis, anfractibus iiumerosis, spiraliter striatis, lon- 

 gitudinaliter plicatis, costis tribus (ultimo anfractu 

 septem) ad plicas frequentes tuberculiferis cinctis. 

 aperturd oculi, cauali longiusculo, subrecurco, labro 

 laqueato. 



October, 1865. 



