22 J. WILLIAM BUCHANAN 



Pieces as small as one-third the anterior zooid do not move 

 about to any great extent, consequently the higher rate of the 

 controls cannot be accounted for by their greater motor activity. 

 On the contrary, it is probable that motor activity is greater 

 in the pieces subjected to the chloroform. An extended series 

 of preliminar}^ experiments with whole worms showed that 

 chloroform increases the oxygen consumption of intact animals 

 in the concentrations used during the first two to four hours of 

 exposure; this increase is undoubtedly due in large measure to 



Usual rate, whole worms of similar condition, 0.00040-45 cc. per two hr. 



increased motor activity, for the animals wriggle constantly 

 during that time. In another series of five experiments with 

 halves of the first zooid, the rate of oxygen consumption was 

 also slightly increased, and here, too, the increase is attributed 

 to increased motor activity. But in pieces as small as one-third 

 the first zooid muscular coordination is much reduced and the 

 stimulation of section greater, especially in the C pieces; there 

 is little wriggling, and motor activity, while probably greater 

 than in the control, is not sufficient to obscure the fact that 

 the chloroform prevents to a greater or less extent the nervous 

 stimulation of section. Because of the complication introduced 

 by the increased muscular activity actuated by the chloroform, 

 the data in table , 2B ^nust be regarded as only indicative of the 



