COOKE : ON GEOGRAPHICAL DISTRIBUTION. 



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The following species just reach the western coasts of the Channel 

 and South and West Ireland : — 



Lepidopleurus scahridus (Jeff.). 

 Acanthochites discrepans (Bronn). 

 Pteria hirundo (L.). 

 Crenella rhovibea (Berk.). 

 Divaricella comvmtata (Phil.). 

 Lepton squamosum (Mont.). 

 L. sulcatulum, Jeff. 

 Galeomma turtoni, Brod. & Sow. 

 Cardiuvi tuberculatum, L. 

 C. papillostmi, Poli. 

 Thracia pubescens (Pult.). 

 Mactra glauca, Born. 



Donax variegatus (Gmel.). 

 Emarginula conica, Schum. 

 Calliostoma exasperatum (Penn. 

 C. striatum (L.). 

 Truncatella truncata (Mont.). 

 Calyptraa chinensis (L.). 

 Cassidaria tyrrhena (L.). 

 C. echinophora (L.). 

 Donovania minima (Mont.). 

 Mangilia rugulosa (Phil.). 

 Aplysia depilans, L. 



