282 CEYLON PEARL OYSTER REPORT. 



Family: TUEBINELLID^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. ra/pa, Gmel., = gravis, 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 : FASCIOLARIID^. 



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, Reeve. 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: MITKIDJE. 

 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, 



