G. H. PARKER 



235 



minations were made from each animal. After these steps had been 

 taken the glass plate to which the sea anemone was attached was 

 turned over and the length of the tongue from one point of stimu- 

 lation to the other was measured. In preparing the tongue it was 

 found easy to leave the tissue attached to the glass plate to which 

 the sea anemone as a whole had attached itself and thus to facihtate 

 greatly the measurement of the length of the tongue. The results 

 of these measurements on three animals, A, B, and C, are given in 

 Table I. 



TABLE I. 



Reaction times are expressed in hundredths of a second of three specimens of 

 Melridium, A, B, and C, to faradic stimuli applied to the pedal edge of the 

 column at points 1, 2, and 3 (Fig. l) and responded to by the contraction of 

 the longitudinal mesenteric muscles. The readings were made in fiftieths of a 

 second, but for convenience in tabulation they have been converted into hun- 

 dredths of a second. The rates of transmission, as calculated from data con- 

 tained in the table, are given for the three animals in the lowest line in the 

 table. During experimentation the animals were kept in sea water at a tem- 

 perature of 21°C. 



