'272 CEYLON PEARL OYSTER REPORT. 



Family : TRICHOTEOPID.E. 



Lippistes helicoides, Montfort (Separatista chemnitzii, A. Adams). Donnan's 

 Muttuvaratu Paar, Gulf of Manaar. 



A fine specimen, with the animal. The exact position of this genus is not yet quite 

 fixed, but it seems to have a certain amount of affinity with the Trichotropidse. 



Family: XENOPHORID^. 



Xenophora corrugata, Reeve. Pearl banks, Gulf of Manaar ; off Aripu ; S. of 

 Adam's Bridge ; deep water off Galle ; Trincomalee. 



Xenophora indicus, Gmelin. S.E. of Ceylon. 



Family: OAPULID^E. 



Crucibulum (Bicatillus) extinctorum, Lamarck. Deep water off Galle ; off* Aripu. 



Crucibulum (Bicatillus) morbidum, Reeve. Pearl banks, Gulf of Manaar. 



Crucibulum violaceum, Carpenter. Off Cheval Paar. 



Calyptraa layardi, Reeve. S. of Adam's Bridge. 



Calyptraea (Galerus) edgariana, Melvill. Pearl banks, Gulf of Manaar ; off 

 Aripu ; Trincomalee. 



Crepidula (Siphopatella) walshi, Herm. Gulf of Manaar. 



Capulus lissus, E. A. Smith. S. of Modragam Paar. 



Amathina tricostata, Gmelin. S. end of Cheval Paar. 



Family : HIPPONYCID^E. 

 Mitrularia equestris, Linn. Gulf of Manaar. 



Family: SOLARIID/E. 

 Solarium laevigatum, Lamarck. Deep water off Galle. 

 Solarium impressum, Nevill. Trincomalee. 



Solarium modestum, Philippi. Pearl banks off Aripu, Gulf of Manaar. 

 Solarium perspectivum, Linn. Trincomalee. 

 Solarium (Torinia) variegatum, Gmelin. Gulf of Manaar. 



