851 



The only specimen we possess of this magnificent shell is in- 

 complete in the aperture : it is more cylindrical than either of the 

 preceding, and the central whorls gently swelled ; some of them 

 having a slight angle near the upper part. The dark zebra-like 

 markings give a rich appearance to the exterior. Mr. Cuming's 

 specimen is from Torres Straits, by Captain Ince. 



10. Cerithium maculosum (pi. clxxvii. f. 29), Martyn. 

 Clava maculosa, Martyn, Univ. Conch, pi. 57. Cerithium clava, 

 Briiff., E. M. p. 4-79; Martini Conch, t. 10. p. 256. vig. 22. 

 f. a, b. C. marmoreum, Kiener, pi. 31. f. 1. 



Cerith. testa ponderosa, ventricosa, pallida, fusco maculata, 

 spiraliter inciso-sulcata ; anfractibus superioribus costatis, me- 

 dianis undulatis, ultimo varice magno ; sutura partim crenulata ; 

 apertura magna, alba, postice in canalem producta ; labio interno 

 subangulato, prope canalem posticum incrassato, antice laminatim 

 cxpanso ; labio externo subindentato, versus canalem incurvato ; 

 canali angustato, profundo, abrupte rccurvo. 



This very thick, broad Cerithium is of a light colour, spotted 

 with brown. The upper whorls are ribbed ; the middle ones are 

 comparatively smooth : the last has a great varix opposite the 

 mouth. The whole shell is marked by incised spiral lines. 



11. Cerithium nobile (pi. clxxvii. f. 28), Reeve. 



Cerith. testa crassa, elongata, pallida, tessellata, spiraliter lineis 

 elevatis cincta ; anfractibus numerosis, superioribus rotundis, spar- 

 sim varicosis, medianis lsevibus, rectis, ad suturam paululiim ele- 

 vatis ; apertura subquadrata, alba, bicanaliculata ; labio externo, 

 Isevi, versus canalem incurvo ; labio interno laminatim incrassato, 

 postice uniplicato ; canali alternato, abrupte recurvo. 



This shell is more gracefully formed than the preceding. The 

 whorls are compressed at the sides, and marked by pale fulvous 

 bands, crossed in squares. The aperture resembles that of C. 

 maculosa. Mr. Cuming brought his specimens from Mindanao, 

 Philippines. 



12. Cerithium obeliscus (pi. clxxvii. f. 30, 31, 32), Brug., 

 E. M. pi. 443. f. 4, a, b. Murex Sinensis, Gmel., no. 54. 



Cerith. testa pyramidali, solida, punctis et maculis fuscis nigres- 

 centibus variegata, spiraliter granoso-sulcata ; anfractibus ad latera 

 rectiusculis, ad suturam tuberculatis ; ultimo anfractu inflato, uni- 

 varicoso ; apertura brevi ; labio interno uniplicato, laminato ; labio 

 externo arcuato ; canali abrupte ad dorsum reflexo. 



