MECHANORECEPTORS AND THE BEHAVIOUR OF 



ELASMOBRANCH FISHES WITH SPECIAL REFERENCE TO THE 



ACOUSTICO-LATERALIS SYSTEM 



B. L. ROBERTS 

 The Laboratory of the Marine Biological Association, Plymouth PL1 2PB, England 



Dr. Barry Roberts prepares for an experiment with an anesthetized dogfish, 

 clamped in a head holder. 



331 



