CERITHIUM. 77 



with numerous transverse striae ; fulvous ash- 

 colour, marbled by red or brown ; a rather spinous 

 series of tubercles girds the middle of the whorls ; 

 canal short, slightly turned backwards; sutures 

 crenulated. 2^. W. 27. 152. 



C. OBELiscus. Turreted, ventricose, with 

 three rows of granulated striae, and the sutures 

 tuberculated ; greyish tawny, spotted with red 

 and brown ; pillar with one tooth ; beak ascend- 

 ing. 2. W. 27. 142. 



C. RETicuLATUM. Elongate, turreted, with 

 longitudinal ribs, and four transverse grooves on 

 each whorl, forming uniform flattened tubercles 

 all over ; pale brownish, beak very small, almost 

 obsolete, f . B. W. 28. 165. 



C. ALUco. Whorls smooth beneath, above 

 with a series of ascending spinous tuberculations ; 

 whitish, spotted and streaked with red and black ; 

 canal recurved. 2. W. 27. 146. 



C. RADULA. Turreted, brovm; whorls with 

 four or five rows of granulated striae, of which, 

 when adult, the middle changes into sharpish tu- 

 berculations ; sutures indistinct; beak short and 

 straight. 2. S. 377- 



C. ASPERUM. Turreted, with plaited longi- 

 tudinal muricated ribs, and transverse striae; 

 white, beak long and ascending ; pillar with one 

 plait. Ij. W. 28. 159. 



