,708 



THE AMERICAN NATURALIST [Vol. XL 



Mkthod 



The method followed was that of gross dissection, combined 

 with that of stimnlation hy the inchieed electric cnrrent, of tlie 

 muscles and nerves concerned. The animals were freed from 

 their shells by means of a hatchet, ciuj)pino- away the shell alonfj; 

 the line of the canal, and finally twistino- the animal ont; and then 

 left f..r twelve hours or more in a mixture of waste alcohol and 



proboscis usually in full extension, and do(>s not really kill it, 

 though, of course, causing d(vp narcosis. In this condition the 

 various muscles (or nerves i can be dissecttMl out, stinuiiaK'd, and 

 their action studied. 



