ROCK-BORERS AND HARD-SHELL CLAMS 



1 R.iyed Machara, ilachara Amboma. 5 Xuttall's Hard-shell Clam. Saxidamiit Xiillalli!. 



2 Ridged Rock-borer, Pelrkola coihilala. 4. 8 East Coast Hard-shell Clam, or "Little Xcck," 



3 Piddock-shaped Rock-borer, Pelricola fholcidijormis. Venus mcrcmaru. 



