886 



in mangrove swamps and the mouths of rivers in Singapore and 

 Borneo." — A. Adams. 



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

 Jay? C. obtusum, var., Kiener. 



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



octo. 



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

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



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

 Adams (Cerithidea) . 



Cerith. testa C. obluso 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 Rhizopliora or man- 

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

 samis, Island of Mindanao, Philippines. 



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

 (Murex), Linn. Syst. Nat. ed. 12. p. 1226. 1 Turbo pulcher, 

 Dillw., Cat. no. 91. 



Cerith. testa decollate, spiraliter tenuistriata, longitudinaliter 

 plicata ; anfractibus octo vix veutricosis ; apertura subquadrata ; 

 columella tortua, brevi ; labio externo subexpanso. 



A smoother shell than the preceding, but having longitudinal 

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

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

 near the suture. Cuba. 



165. Cerithium Sinense (pi. clxxxvi. f. 274), P/iilippi, 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- 

 panse 



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 stria?. 



166. Cerithium Charboknieri (pi. clxxxvi. f. 279), Petit, 



