170 



PROP. E. VON MARTENS ON THE SHELLS 



mangrove-trunks ; Kisseraing. Bed Sea, Natal, Madagascar, 

 Maldives, Ceylon, Nicobars, Mergui, Philippines, Samoa Islands, 

 Tahiti. 



50. Littorina melanostoma, Gray, Philippi, Abbild., Lit. 

 pi. 5. fig. 16 ; Reeve, Coneh. Icon. x. pi. ix. fig. 45. 



Mergui, King Island Bay, in grass and on mangrove-trees at 

 spring-tide level. Ceylon, Singapore, Borneo. 



51. Littorina rtjbropicta, n. sp. (PI. XVI. fig. 2, a-f.) Testa 

 elato-conica, solida, anfractibus plano-declivibus, spiratim sul- 

 catis, ultimo ad basin carina crassiuscula prominula cincto ; pal- 

 lide flava, strigis sanguineis rectis vel obliquis, interdum inter- 

 ruptis picta ; apertura parviuscula, margine columellari sat 

 dilatato. Long. 18, diam. 11 ; aperturse long. 9^, diam. 6 millim. 



Number of the spiral furrows on the last whorl between the 

 suture and the keel 7-9, on the base 10-12 ; keel in some speci- 

 mens subnodulose. 



Kiug Island Bay, in grass and on mangrove-trees flooded at 

 spring-tides. 



L. conica, Philippi, loc. cit. vol. iii. p. 9, pi. 6. figs. 1, 2, and 

 Eeeve, I. c. x. pi. viii. fig. 36, Nevill, Hand-list, ii. p. 149, found by 

 Th. Philippi at Mergui, appears to be very near to this variety ; 

 but is described as being a thin shell, and its colours are different. 

 The variety of L. carinifera figured by Philippi, loc. cit. pi. 5. 

 fig. 24, agrees very much with our specimens. L. arboricola, 

 Reeve, I. c. x. pi. vi. fig. 27, is quasi-intermediate between this 

 species and L. scabra. 



PALTTDINIDiE. 



52. Stenothyra moniltfera, Benson, Annals Sf Mag. Nat. 

 IIJ.s/. (2) mi. 1856, p. 497; Conchol. Indica, pi. 37. fig. 4; 

 Nevill, I land-list, ii. p. 41. 



Mergui, on mud-flats in society with Assiminea and Ampulla- 

 rina. Tavoy. 



Assimineidje. 



53. Assi.NfiNEA JiRY.YJC\Jh\,l , Jbi/p;r (ITydrocena), Mon. Pneum. 

 ii. Suppl. |). 1 56 ; Nevill, Journ. As. Soc. Bengal, vol. 1. pt. 2, 1881, 

 p. 159, pL 7. figs. 6, 6a; Hand-list, ii. p. 67. 



Assiminea miniatej v. Mar/ens, Ann. Mag. Nat. Hist. 1 866, 3rd ser. 

 vol. xvii. p. 204. 



