CERTTHIUM.— Plate VIII. 



As in some one or two species of many other genera, 

 the l)and of colouring matter resides in the epidermis and 

 comes off with it, leaving the shell white. 



Species 52. (Mus. Cuming.) 



Ceiiithium scabridusi. Ceritli. lestd oldongo-turritd, 

 spiraliter striata, scabrd, alba, castaneo irregulariter 

 sirigato et nmcidalo, anfraciibus medio wigulaUs, ad 

 unguium acute tubercuUferls, aperturd ovali, caiiali 

 mediocri, aperto, labro expanso. 



TiiK ROUGHENED Cerithi'jM. Shell oblong-turreted, 

 spirally striated, scabrous, white, irregularly striped 

 and spotted with chestnut, whorls angular in the 

 middle, with acute tubercles on the angle, aperture 

 oval, canal middle-sized, open, outer lip expanded. 



Fhilippi. 



I[„b. ? 



A bright little species, with angular whorls and white 

 angular plaits. 



Species 33. (Mus. Cuming.) 



Ceuithiu.m Mediterraneum. Cerith. testa oblongo- 

 turritd, spiraliter lineis impressis striata, albido-sub- 

 cmruled, castanea-nigrescente maculatd el strigatd, an- 

 fraciibus angulalis, ad suturam tuberculis nnmerosis 

 rolundis, ad unguium magnis, productis, cinctis, ultimo 

 anfractu depresso, subcontracto, aperturd parvd, canali 

 brevi, aperto, labro simpUci. 



The Mediterranean Ceritiiium. Shell oblong-tur- 

 reted, spirally striated with impressed lines, whitish- 

 grey, spotted and striped with very dark chestnut- 

 colour, whorls angulated, circled at the suture with 

 numerous rounded tubercles and at the angle with 

 large prominent ones, last whorl depressed, rather 

 contracted, aperture small, canal short, open, outer 

 lip simple. 



Deshayes, ed. Lamarck, t. ix. p. 293. 

 Cerithium, fuscatv.m, Costa. 



Hub. Mediterranean. 



A well-known form, subject to considerable variation of 

 colour. 



Species S-i. (Mus. Cuming.) 



Cerithium suturale. Cerith. lestd breviusculd, scabroso- 

 striatd, alhd, ad suturam et lined purpurea cinctd, 

 apice purpurea, anfraciibus num.erosis,plicis tuberculi- 

 feris magnis, medio angulalis inunitis, aperturd parvd, 

 subruluudd, canali brevi, labro crenulato. 



The sutured Cerithium. Shell rather short, with 

 scabrous stricE, white, with a purple line at the su- 

 ture, apex purple, whorls numerous, provided with 

 large tuherculated plicse, angular in the middle, aper- 

 ture small, rather round, canal short, outer lip cre- 

 unlated. 



Philipi'I, Abbildungen, Cerith. t. i. f. 4. 



Hab. Island of Ticao, Philippines ; Cuming. 



Distinguished by the purplish line giriling the whorls at 

 their sr.ture. 



