C E III T II I U M. 



Plate XII. 



Species 78. (Fio:. n, h, Mus. Cuming.) 



Cerithium DUBiuil. Cerith. testa drevi, lata, pymnd- 

 datd, fnlvd, mifractUjiis angidatis, veiitricosli, ad an- 

 gidum plkiferis, infra ad snturam lined taberciihild, 

 inter tnbercidi.% ruhro-macnlatd citictis, anfractu ultimo 

 subquadrato, aperturd subquadratd, colnmelld arcnatn, 

 canali brevi, aperlo. 



The doubtful Cerithium. Shell short, wide, pyrami- 

 dal, fulvous, whorls augulated, ventricose, plaited at 

 the angle, girt beneath at the suture with a tubercu- 

 lated line, red-spotted between the tubercles, last 

 whorl rather square, aperture rather squai'e, columella 

 rather arched, canal short, open. 



SowERBY, Thes. Conch. Cerithium sp. 62. 



Hu/j. Van Diemeu's Land. 



Although the specimen represented by figure h is much 

 broader than the other, which is the original type, it can 

 scarcely be doubted that both shells belong to one species. 



Species 79. (Mus. Cuming.) 



Cerithium pl.^num. Cerith. tedd lurritd, aiigmlinsciild, 

 albd, spiraliter castaneo fusciatd, striatd, apice livido, 

 anfraclibiis rectis, planis, prope snturam avgnlatis, 

 louijiludinallter plicalis, plicis distautibus, titbcrculi- 

 feris, an/ractu ultimo subquadrato, iufra custd acuta 

 ciucto, ad basin aiiyustato, aperturd rjuadratd, canali 

 producto, redo, subclauso. 



The fl.\t-sided Cerithiuii. Shell turreted, rather 

 narrow, white, spirally banded with chestnut, striated, 

 the apex livid, whorls straight, flat, angnlated near 

 the suture, longitudinally plaited, plaits distant, tuber- 

 culated, the last whorl rather square, girt with a sharp 

 rib below, narrowed at the base, aperture rather 

 square, canal produced, straight, nearly closed. 



Anton, Philippi, Abbildungen. 



Hub. Philippines; Cuuiing. 



The flattened sides, and the abrupt termination of the 

 last whorl, give a cylindrical, truncated appearance to this 

 species. 



Species SO. (Mus. Cuming.) 



Cerithium versicolor. Cerith. testa angustd, varicosd, 

 albd, fusco varieyatd, spiraliter striata, tuberculis ni- 



grescentibns, distiucfis, rotundis, lavibus munitd, an- 

 frnctibus suhventricosis, numerosis, snturd excavatd, 

 aperturd ovali, columella ttreviiisculd, canali brevi, 

 angusto. 



The CH.VNGE.iBLE Cerithium. Shell narrow, varicose, 

 white, variegated with brown, spirally striated, pro- 

 vided with dark rounded smooth di.stinet tubercles, 

 whorls rather ventricose, numerous, suture excavated, 

 aperture oval, columella rather short, canal short, 

 narrow. 



C. B. Adams, Contributions to Couchology, vol. i. 



Hah. Jamaica. 



A rather narrow shell, painted brown on the tubercles. 



Species 81. (Fig. a, b, Mus. Cuming.) 



Cerithium pipehitum. Cerith. t.estd irregulariter py- 

 ramidatd, albd, spiraliter costatd, coslis inlermediis 

 majoribus castaneo-punctatis, aufractibus angulatis, 

 ultimo rotunda, aperturd rolundd, productd, columella 

 recta, canali brevi, angusto, labro rotunda. 



The peppered Cerithium. Shell irregularly pyrami- 

 dal, white, spirally ribbed, the intermediate ribs 

 larger and spotted with chestnut, whorls angular, the 

 last rounded, aperture round, produced, columella 

 straight, canal short, narrow, outer lip rounded. 



SowEl!BY, Thes. Conch. Cerithium sp. 76. 

 C. punctatnm, Bruguiil're. 



Uab. Senegal ; Lamarck. Philippines ; Cuuiing. 



The surface of this pretty little shell is grooved between 

 narrow, rounded ribs, which are alternately marked with 

 neat spots. 



Species 83. (Mus. Cuming.) 



Cerithium filosu.m. Cerith. tesld pyramidald, subren- 

 tricusd, albd, lineis rubris inter castas cinctd, spiraliter 

 minutissinie striatd, aufractibus subreutricosis, lonyi- 

 tudinaliter plicatls, spii'aliter seriebus tulterculoruni 

 tribus cinctd, snperue serie parvd intermedid, tubercu- 

 lis viagnis, rotundis, interslitiis angustis, aperturd 

 ovali, canali brevi, I tbro laqueatu. 



The threaded Cerithium. Shell tapering, rather ven- 

 tricose, white, girt with red lines between the ribs. 



October, 1 805. 



