INDEX. 



Plate. Fig. 



rugosus, Mytilui - - _ . . j,, 



rustlcum, Cardium - - 1%/ > % 



striata, Pholas - - . . -117 



subtruncata, Mactra - . . -126 



terrestris, Trochus - . _ - 111 



triplicata, Voluta - . _ - 138 



tubiformis, Sabella . - • - J 33 



undata, Venus - - - - - 121 



ungulatus, Mytilus - - - 12S t 



END OF VOL. IV, 



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