130 CERITHIUM. 



C. SPATHULIFERUM, Sowb. PI. 23, fig. 86. 



With distant, longitudinal and spiral riblets the intersections 

 forming two revolving rows of strong tubercles on the spire whorls, 

 three on the body one of which is above and two below the peri- 

 phery, tubercles flattened ; yellowish white or ash color. 



Length. T25 in. 



Sab. unknown. 



Probably a variety of the preceding species. 



C. OPPORTUNUM, Bayle. PL 23, fig. 85. 



Shell distantly costate, so as to appear many-sided, crossed by 

 somewhat distant spiral riblets, the body whorl with two larger ribs, 

 on the periphery and below it ; ashy gray, Length, 2 in. 



N. Australia. 



The name has been recently proposed instead of C. polygonum t 

 Sowb., preoccupied by Leymerie for a fossil species. 

 C. DIALEUCUM, Phil. PI. 23, figs. 88, 87. 



Nodose, crossed by riblets and intermediate fine striae; yellowish 

 white or whitish, with narrow r chestnut or chocolate bands between 

 the revolving riblets. Length, 1 in. 



Philippines. 



C. striatum, Hombr. et Jacq. (fig. 87), is a synonym. 



C. PRODITUM, Bayle. PL 23, fig. 89. 



Longitudinally plicate, tuberculated by the crossing of spiral 

 riblets, whorls angular in the middle, the last with two beaded rib- 

 lets below ; whitish, stained with chestnut between the plications. 



Length, 1 in. 



Philippines. 



Described by Sowerby under the name of C.jusiforme, a name 

 preoccupied by Leymerie for a fossil species. * 



C. ROSTRATUM, Sowb. PL 23, figs. 90, 91. 



Graceful, thin, white, longitudinally plicate and finely granosely 

 ribbed, often minutely chestnut dotted between the granules; canal 

 produced, usually stained with chocolate, Length, 15-22 mill. 



Philippines, Viti and Sandwich Islam I*. 



C. gracilis, Pease, is a synonym. 



C. LISSUM, Watson. PL 23, fig. 92. 



Longitudinally rather closely ribbed, cut and somewhat tubercu- 

 lated by spiral striae ; brownish white, with a white varix on the 

 body whorl. Length, 1 in. 



Fiji I*. 



