OP MEKG-UI AND ITS ARCHIPELAGO. 



169 



44. Potamides (Cerithidea) quadrattjs, Sow., Beeve, Conch. 

 Icon. xv. Cerithidea, pi. i. fig. 5. 



King Island. Salang, Malacca, Singapore. 



45. Potamides (Cerithidea) pluviatilis, Botiez and Mi- 

 chaud, Galerie d. Moll. pi. 31. figs. 19, 20; Kiener, Cerithium, 

 pi. 29. fig. 3 ; Beeve, Conch. Icon. xv. Tympanotonos, pi. ii. fig. 9. 



Murex cingulatus, Grmelin, Chemnitz, Conch. Cab. vol. iv. 

 fig. 1492, is probably the same species. 



Mergui, King Island Bay, littoral ; Elphinstone Island, on 

 trunks of mangrove-trees and on sand below them, immediately 

 below high-water mark ; Sullivan Island, 4 fathoms ; Sullivan, 

 high-water mark. Salang, Singapore. 



46. Potamides (Cerithidea) alattjs, Bhilippi, Abbildungen, 

 Cerithium, pi. 1. fig. 11. 



Yery near Cerithium micropterum, Kiener. 

 Mergui, mud-flats ; Kisseraing Island ; Laloon Bay, Elphin- 

 stone Island. Madras. 



47. Planaxis pyramidalis, Gmelin, Chemnitz, Conch.-Cab. 

 vol. iv. figs. 1170, 1171 ; Beeve, Conch. Icon. xx. pi. i. fig. 4 ; 

 Quoy Sf Gaimard, Voy. ' Astrolabe,' Moll. pi. 33. figs. 25-29. 



]S"ga Islet in King Island Bay, in grass at the spring-tide level ; 

 Owen and Sullivan Islands. Bed Sea, Zanzibar, Mauritius, 

 Seychelles, Tranquebar, Ceylon, Salang, Benang, Singapore, 

 Celebes, Philippines, VaniJcoro, New Caledonia. 



Yery near B. sulcatus, Born, from the West Indies. 



LlTTORPNTDiE. 



48. Littorpna scabra, L., Bumph. Amboinsche Bariteitkamer, 

 p. 98, pi. 29. fig. Y (Buccinum foliorum) • Bhilippi, Abbild., Lit. 

 pi. 5. figs. 3-5 ; Beeve, Conch. Icon. vol. x. Littorina, pi. v. fig. 21. 



Mergui, King Island, mangrove-swamps ; Cruro islet, between 

 King Island and Hayes Island, on mangrove-trees flooded at 

 spring-tides ; Elphinstone Island, on stems of mangrove-trees at 

 high-water level; Sullivan Island. Zanzibar, Mauritius, Sey- 

 chelles, Ceylon, Salang, Singapore, Moluccas, Neiv Guinea, Tonga. 



49. Littorina intermedia, Bhilippi, Abbildungen, Lit. pi. 5. 

 figs. 8, 9 (not Beeve, Conch. Icon. x. pi. xviii. fig. 101). 



Near to the preceding ; but the last whorl quite round, without 

 keel, and of smaller size. 



Mergui, mud-flats ; King Island ; Elphinstone Island Bay, on 



