855 



23. Cerithium lmve (pi. clxxxv. f. 270), Quoy, Voy. Astr. 

 pi. 54. f. 1-3. 



Cerith. testa magna, conica, alba, attenuate ; anfractibus nume- 

 rosis, planulatis, inferno prope suturam subangulatis, bicarinatis, 

 ultimo subtus rotundato; apertura oblique quadrata; columella 

 tenui, torta ; labio externo te)iui, postice emarginato, antice ro- 

 tundatim producto ; operculo ovato, paucispirali. 



Although this large white shell seems, in the shape of the aper- 

 ture and in general appearance, to consort with C. telescopium, 

 Quoy reports and figures an oval, paucispiral operculum. It 

 would seem therefore to belong to the present division, and is a 

 near neighbour to the fossil C.gigas. It is an Australian species. 



24. Cerithium tuberosum (pi. clxxviii. f. 49), Fabricius, 

 Colum. JHquat. Cerith. erythramense, Lamarck, Anim. s. vert. 

 Cerith. no. 12. Strombus striatus, Schroter. Buccinuin tube- 

 rosum. 



Cerith. testa alba, fusco-maculata et fasciatim punctata, spirali- 

 ter acute striata, nodulis in medio angulatis, irregularibus, et vari- 

 cibus magnis armata ; labio interim antice et postice plicato ; labio 

 externo angulato, subdigitato, antice super canalem incurvo ; ca- 

 nab rectiusculo. 



A more acute, lighter shell than C. nodulosum, with the canal 

 rather longer, the outer lip more angular and more sharply notched, 

 the sculpture more sharp and minute. Hab. Near Suez. 



25. Cerithium columna (pi. clxxviii. f. 55, 56, 57, 58), 

 Sowerby, Gen. of Sh. C. echinatum, Kieuer. 



Cerith. testa breviuscula, subobtusa, spiraliter sulcata, angulatim 

 costata, variegata, plerumque ad apicem livida, costis magnis ; 

 apertura bicanaliculata ; labio interno postice uniplicato ; labio 

 externo incrassato, laqueato, antice simplici ; canali brevi. 



This species is varied in colour, form, and sculpture, but its 

 general character is best expressed in figure 56, as consisting of 

 rather distant, sharply angular ribs, which are crossed by sharp 

 lines. It differs from C. nodulosum and C. erythrmnense in being 

 of a more obtuse form, and not having the outer lip drawn round 

 over the canal. The apex is sometimes livid. Hah. Philippines, 

 C tuning. 



26. Cerithium citrinum (pi. clxxix. f. 66), Nobis. C. co- 

 lumna, Kieuer, non Sowerly, Genera of Shells, f. 7. 



Cerith. testa flavescente, acute pvramidali, spiraliter striata, cos- 



5 t 



