466 ZOOLOGY. 



37. S. dentatus, L. 



38. Rostellaria curvirostiis, Lam. 



Common on sandy shore at Malkatto. 



Family CYPE^ID.^. 



39. Ci/prcea turdus, L. 



40. Trivia oryza, Lam. 



Family CEEITHIID^. 



4L Cerithum aspersum, Desh. 



42. C. variegatum, Quoy. 



Very common. 



43. G. Adenense, Ev. 



Not rare. 



44. G. inUrstriatum, Sow. 



45. C. Kochii, Phil. 



46. C bifasciatum, Sow. 



47. G. sp. noT. 



A single specimen in poor condition. 



48. C. columna, Sow. 



49. Ti/mpanofonos Layardi, Ev. 



50. T. fluviatile. Pot. and Mict. 



51. Pyrazus palustris, Brug. 



Common amongst mangroves. 



52. Bittium, sp. nov. 

 A single specimen. 



53. Triforis ruber, Hinds. 



54. T. distinctus, Desh. 



55. Fastigiella (?) sp. 



A single specimen in bad condition. 



Family CEEITHIOPSID^. 



56. Gerithiopsis, sp. 



Apparently new. 



