158 MANUAL OF THE MOLLUSCA. 



! 



gether. LHstr.y 10 sp, W. Indies, W. Africa, Philippines, Australia, Pacific, 

 Panama. The chitoneUae are found in fissures of coral rock (Cuming). 



Grypko- chiton. Gray. C. nervdcanus. 



Helminthochltod, Salter, 1847. H. Griffithii, Salter Geol. Jom-n. Plates 

 sub -quadrate, not covered by the mantle ; apophyses widely separated. Fossil. 

 Silurian. Ireland. 



W. OSTELL. PRIMJiR. HART STKEtT, BLOOMSBURY. 



