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. PL 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, C, granulatum, Linn, C. rugatum, Mart., C. 

 lineatwn, Lam. (fig. 63). 



