886 



in mangrove swamps and tlie mouths of rivers in Singapore and 

 Borneo." — A. Adams. 



162. Cerithium Kieneri (pi. clxxxvi. f. 272), Homb. et 

 Jay? C. obtusum, var., Kiener. 



Cerith. testa C. ohtuso simili, sed graciliore, tenuiore ; anfractibus 

 octo. 



Usually considered a variety of C. obtusum, but much narrower, 

 and with eight whorls instead of six. Phihppines and Borneo. 



163. Cerithium rhizoporarum (pi. clxxxvi. f. 273), A, 

 Adams (Cerithidea) . 



Cerith. testa C. obtnso simili, sed angustiore; anfractibus pla- 

 nulatis, ad suturam moniliferis. 



This species differs from C. obtusum and C. Kieneri in having 

 the whorls flat or straight. It inhabits estuaries near the sea, 

 where it is found among the roots of the Rhizophora or man- 

 grove. Mr. Cuming has taken it at Cagayan, Province of Mi- 

 samis. Island of Mindanao, Phihppines. 



164. Cerithium decollatum (pi. clxxxvi. f. 276), Linnaus 

 (Murex), Linn. Syst. Nat. ed. 12. p. 1226. Turbo pulcher, 

 Billw., Cat. no. 91. 



Cerith. testa decollata, spiraliter tenuistriata, longitudinaHter 

 plicata ; anfractibus octo vix ventricosis ; apertura subquadrata ; 

 columella tortua, brevi ; labio externo subexpanso. * 



A smoother shell than the preceding, but having longitudinal 

 curved ribs and fine spiral stride, which are strongest in the inter- 

 stices. The whorls are generally hght-coloured on the upper part 

 near the suture. Cuba. 



165. Cerithium Sinense (pi. clxxxvi. f. 274), Philippic Ab- 

 bild. t. 1. f. 15. 



Cerith. testa laevigata, subcornea, pyramidali, longitudinaliter 

 plicata; anfractibus octo ad undecim, paululum ventricosis ; aper- 

 tura subquadrata ; columella tortua ; labio externo paululum ex- 

 panso. 



C. decollatum, is a western species, while this is from China and 

 other parts of the East ; it is narrower, is never decollated so far 

 down, and never has spiral striae. 



166. Cerithium Charbonnieri (pi. clxxxvi. f. 279), Tetit, 



