282 CEYLON PEARL OYSTER REPORT. 



FAMILY: TURBINELLID^E. 



Turbinella pyrum, LINN. (Turbinella rapa, GMELIN.). Pearl banks off Aripu, Gulf 

 of Manaar ; deep water off Galle ; Trincomalee. 



The "Chank" occurs in the collection from its egg-capsules, through all stages of 

 growth, to the large and swollen spotless form distinguished by most authors as 

 T. rapa, GMEL., = grams, DILLW., = clavata, WAGN., = napus, LAM. ; but the 

 distinction does not hold good, the shell becoming more swollen and less spotted with 

 increase in size. 



Vasum turbinellum, LINN. Trincomalee. 



Tudicla spirillus, LINN. Pearl banks, Gulf of Manaar ; off Mutwal Island ; Palk 

 Bay ; deep water off Galle ; Trincomalee. 



Melongena vespertilio, LAMARCK. Gulf of Manaar. 



FAMILY: FASCIOLAKIID^E. 



Fusus colus, LINN. Pearl banks, Gulf of Manaar ; Trincomalee. 

 Fasciolaria filamentosa, MARTYN. Pearl banks, Gulf of Manaar ; Galle. 

 Fasciolaria trapezium (LiNN.). N. of Gulf of Manaar ; Trincomalee. 

 Latirus lancea, GMELIN. Gulf of Manaar. 

 Latirus (Peristernia) pagodiformis, MELVILL. Gulf of Manaar. 



Latirus (Peristernia) pulchellus, EEEVE. Pearl banks, Gulf of Manaar ; S. end of 

 Cheval Paar ; S. of Adam's Bridge. 



Latirus (Peristernia) turritus, GMELIN. Gulf of Manaar ; Trincomalee ; Mudalai- 

 kuli Paar ; S. of Modragam Paar. 



Latirus (Plicatella) polygonus, GMELIN. S. end of Cheval Paar. 



FAMILY : MITEID^. 



Mitra guttata, SWAINSON. N. of Gulf of Manaar. 

 Mitra versicolor, MARTYN. Gulf of Manaar. 



Mitra (Scabricola) crenifera, LAMARCK. Off Galle ; Aripu; S. of Modragam Paar. 

 Mitra (Scabricola) antoniae, H. ADAMS. Gulf of Manaar ; Trincomalee. 

 Mitra (Scabricola) scabriuscula, LAMARCK. Pearl banks, Gulf of Manaar. 





