194 



C. M. CHILD. 



clearly the consequence of cuts of this kind. C. solitaries was 

 used for those experiments. 



Series 9. 



September 12, 1902. Three specimens of C. solitarins were cut 

 obliquely at two different levels as indicated in Fig. I ; the pieces 

 used for experiment in each case being the portions between the 

 two oblique lines. These pieces possessed an oral and an aboral 

 oblique surface. Unfortunately no control pieces with transverse 

 cut surfaces were made but the records in my notes of a set of 

 pieces which were cut at the same time and kept in the same 

 aquaria will serve as controls. These pieces were prepared as 



FIG. i. 



FIG. 2. 



follows : after the removal of the oral end from two specimens 

 by means of a transverse cut just aboral to the oesophagus the 

 remaining portion of the body was cut into three equal pieces 

 (Fig. 2). These pieces may be designated as A, J5, and C, A 

 being the most oral of the three. By comparison of Figs. I and 

 2 it is seen that the oral end of the control piece A is at almost 

 the same level as the most oral portion of the oblique piece, the latter 

 being slightly more oral, while the oral end of piece B corresponds 

 very closely in level with the most aboral portion of the cut sur- 

 face of the oblique pieces. In sectioning living animals so con- 



