148 CERITHIUM. 



C. ATTENUATUM, Phil. PI. 28, fig. 57, 



Whitish, more or less suffused with chestnut, or entirely chestnut 

 color ; whorls rather flat, with alternate large granulated and small 

 smooth spiral riblets ; outer lip crenated, canal long, narrow, 

 oblique. Length, 2 in. 



Philippines. 



It is C. longicaudatum, Ads. and Reeve. 



C. MATUKENSE, Watson. PL 28, fig. 58. 



With close, rounded longitudinal ribs, granulated by distant 

 spiral threads, three or four on a whorl, occasionally varicose; 

 whitish, with glossy brown spiral lines, and speckled with milk white. 



Length, 1*5 in. 



Viti Is. 



Allied to the preceding species in form, but differs in sculpture. 



C. PHOXUM, Watson. PI. 28, fig. 59. 



With 10 or 11 longitudinal riblets, gradually becoming less regu- 

 lar, and four or five spiral striae, tuberculating the riblets as they 

 cross the latter, the wider spiral interspaces have each two or three 

 inferior striae ; besides these, the whole surface is covered with finely 

 fretted microscopic spirals ; waxy straw color, stained with brownish 

 flesh color. Length, 17 mill. 



Viti Is. 

 C. NOBILIS, Reeve. PL 28, fig. 60. 



Solid, smooth, flat, tumid at the suture, upper whorls angular,- 

 ribbed, tuberculated by spiral sculpture, lower whorls with spiral 

 elevated lines ; yellowish white, with fulvous, waved, longitudinal 

 strigations. Length, 5 in. 



Philippines. 



C. BITUBERCULATUM, Sowb. PL 28, fig. 61. 



Whitish, whorls with a pair of largely tuberculated spiral ribs 

 beneath the suture, and a smaller granulated rib above it, finely 

 striated. Length, 45 mill. 



Australia. 

 C. ASPER, Linn. PL 28, figs. 62, 63. 



With numerous, pinched-up, obliquely longitudinal ribs and equal 

 interspaces, asperated at the crossing of spiral ribs, the interspaces 

 of the latter often bearing several incised spiral lines ; white, or yel- 

 lowish white, the spiral riblets sometimes chestnut colored. 



Singapore, Mauritius, Madagascar, Friendly Is., etc. 



It is C. vibex, GmeL, (7, granulatum, Linn, C. rugatum, Mart., C. 

 lineatum, Lam. (fig. 63). 



