C E R I T H I U M. 



Plate VII. 



Species 41. (Fig. a, b, c, Mus. Cuming.) 



Cerithium varieg.vtum. Cmtli. testa brevi, veutricosd, 

 apice acmu'matd, alba, fidoo et am-anlio variegiitd vel 

 fusco-nigresceiite, a7ifractibiis irregularihus, duobiis ultl- 

 mis injlatis, nodulin pants lavigatis in seriebus dispo- 

 sitis cinctis, aperturd alba, subovali, cannli brevi. 



The variegated Cerithium. Shell short, veiitricose, 

 acumiuate at the apex, white, varied with fawn and 

 orange or blackish-browu, whorls irregular, the last 

 two inflated, girt with rows of small smooth tuber- 

 cles, aperture white, rather oval, canal short. 



QuoY, Voy. de I'Astrolabe, pi. 55. f. 17. 



Hub. Philippines ; Cuming. 



Remarkable for the variations which occur in the co- 

 louring of diflerent specimens, of which the three shells 

 figured may be considered a sample ; in all, the darker 

 colours are upon the rows of nodules in interrupted lines. 



Species 43. (Mus. Cuming.) 



Cerithium Morus. Cerith. testd ovali, brevi, venlricosd, 

 atratd, striata, anfractibiis seriebus tribus tuberculo- 

 rum cinctd, tuberculis rotundis IcBoibus, aperturd brevi, 

 ovatd, cauali brevi, labro crasso, iiitus ad murginem 

 titniato. 



The mulberry Cerithium. Shell oval, short, ventricose, 

 black, striated, whorls encircled with three rows of 

 tubercles, tubercles rounded, smooth, aperture short, 

 oval, canal short, outer lip thick, striped at the mar- 

 gin within. 



Lamarck, Hist. Nat. Auini. sans vert. 



llab. Red Sea. Madagascar. 



Some varieties of this species are variegated with lighter 

 colours, similar to those o^ C. variegata ; but the more 

 solid and regular rows of tubercles and more regular form 

 sufficiently distinguish this species from the latter. 



Species 43. (Fig. a, b, Mus. Cuming.) 



Cerithium petrosum. Cerith. testd brevi, ventricusd, 

 irregulariter pupceformi, varicosd et tuberculatd, pal- 

 lide fulvd, tuberculis irregularlbus seriatim sequenti- 

 bus, varie albis et nigi'is, aperturd ovatd, canali dis- 

 tiucto, brevi, labro tenui, intus crenulato. 



The stony Cerithium. Shell short, ventricose, irre- 

 gularly pupfeform, varicose and tubercidated, pale 

 fnlvous, tubercles in irregular rows, variously white 

 and black, aperture ovate, canal distinct, short, outer 

 lip thin, crenulated within. 



Wood, Ind. Test. Suppl. pi. 4. f 9. 



Ilab. East Indian Archipelago. 



Ditt'ering from C. variegatum in being more ventricose 

 and irregular ; the tubercles are larger and coarser, giving 

 the shell an appearance of being set with black aiul 

 white pebbles of different sizes. 



Species 44. (JMus. Cuming.) 



Cerithium robustum. Cerith. testd pyramidali, solidd, 

 ventricosd, albd, spirallter striatd, anfractibus grada- 

 tim crescentibus, costis spiralibus tribus striatis eras- 

 sis tnberculiferis cinctis, interstitiis caruleis minute 

 scabroso striatis, ultimo costis septem, varicibus nullis, 

 aperturd ovatd, intus nigra fasciatd, canali valido, 

 labro suie.vpnnso. 



The stout Cerithium. Shell pyramidal, solid, ventri- 

 cose, white, spirally striated, whorls gradually en- 

 larged, with three spiral, tuberculated, striated, thick 

 ribs, interstices blue, minutely and roughly striated, 

 the last whorl with seven ribs, varices none, aperture 

 ovate, black-banded within, canal strong, outer lip 

 rather expanded. 



Sowerby. 



Hab. ? 



Of this species only one specimen exists in Mr. Cu- 

 ming's collection ; it is a more solid shell and more regu- 

 larly pyramidal than C. alternatum. The ribs are thicker 

 and striated. The colour between the ribs is grey. 



Species 45. (Fig. a, b, ]Mus. Cuming.) 



Cerithium rugosum. Cerith. testd crassd, ventricu-vi, 

 grised, varicibus albis, irregularibus, anfractibus puu- 

 cis, longiludinaliter plicatis, costis tribus (ultimo pln- 

 rimisj rude tuberculatis cinctis, inter tubercnla macu- 

 lis nigris pictis, aperturd brevi, canali brevissimo, 

 labro crasso, intus crenato. 



The rough Cerithium. Shell thick, ventricose, grey, 



October, 1865. 



