276 CEYLON PEARL OYSTER REPORT. 



Cypraea ocellata (Linn). S. of Adam's Bridge ; Dounan's Paar ; S. end of Cheval 

 Paar ; oft* Galle ; Trincomalee ; S. of Modragam Paar ; off Aripu. 



Cypraea onyx (Linn.), var. adusta (Chemnitz). Pearl banks, Gulf of Manaar. 



Cypraea tigris, Linn. Gulf of Manaar. 



Cypraea vitellus, Linn. S. of Modragam Paar ; Trincomalee. 



Cypraea ziczac, Linn. S. of Adam's Bridge. 



Trivia annulata, Gray. S. of Adam's Bridge. 



Trivia brevissima (Sowerby). Deep water off' Galle. 



Trivia cicercula (Linn). Trincomalee. 



Trivia globosa (Gray). From stomach of Astropecten, off* Chilaw, 10 tathoms. 



Trivia nucleus, Linn. Gulf of Manaar ; Trincomalee. 



Trivia fibula, Kiener. Two " live " examples from Gulf of Manaar. We quite 

 agree with Mr. J. M. Williams, to whom we submitted these specimens, that they 

 are not the same as Trivia globosa (Gray). 



Trivia rubinicolor (Gaskoin). S. of Adam's Bridge. A dead shell, more like a 

 fossil, as recently-dead Trivia are invariably glossy or polished, but Mr. Williams 

 identifies it without any doubt as this species. 



Trivia staphylaea (Linn.). S. of Adam's Bridge; Trincomalee. 



Trivia staphylaea, var. limacina, Lamarck. S. of Modragam Paar. 



Ovula (Volva) volva, Linn. Pearl banks, Gulf of Manaar. 



Amphiperas pyriformis, Sowerby. S. of Modragam Paar. 



Family: DOLIID^E. 

 Dolium maculatum, Lamarck. Gulf of Manaar ; Trincomalee. 



Dolium olearium, Bruguiere. Gulf of Manaar ; Trincomalee. 



Family: CASSIDIDyE. 

 Cassis canaliculata, Lamarck. N. of Gulf of Manaar ; S.E. of Ceylon. 

 Cassis (Casmaria) vibex, H. and A. Adams. S. of Adam's Bridge ; off Galle. 

 Cassis (Phalium) glauca, Linn. Pearl hanks, Gulf of Manaar. 



