238 



DONALD WALTON DAVIS 



TABLE 7 



This table shows the mesenteric forms of thirty-three specimens. Some of these 

 were selected, in collecting, on the basis of the position of the new area or on other 

 grounds that prevent their consideration in connection with some matters for 

 which specimens given in tables 3 to 6 are available. Others were excluded 

 from table 6 on grounds which have been stated in connection with that table and 

 in the text (p. 169 ff). Still others are animals regenerating after artificial cuts. 

 In the case of these last, the length of the regeneration period is given in the 

 last column of the table. Since the period of regeneration is unknown for all 

 other specimens listed in this table, the cut specimens may be identified by the 

 presence of figures in the last column following their formulas. 



Dashes in the columns for Old Mesenteries indicate that some part of the old material 

 present at the time of the recorded division was removed by a later division or cut 

 and the full formula of the old part is therefore unknown. In the old regions 

 of these specimens only bounding mesenteries are recorded. 



The case of No. 80 is discussed on page 211. Attention should be called to the fact 

 that a new mesentery apparently of the first incomplete cycle mates with an old 

 one of the second incomplete cycle. It is clear that no orange stripe was formed 

 in the included endocoel. 



