64 JAMES FRANCIS ABBOTT, 
Fig. C. Diagram of canal system of Cydippid Ctenophor (after Parker & HASWELL). 
Me Meridional canal. Ac Adradial canal. 7 Tentacle in sheath. 
Ic Interradial canal. Jn Infundibulum. 
In 
Fig. D. Diagram of canal system of Coeloplana showing the probable derivation 
from the Cydippid tyle. 
Ac Adradial canal. Jc Interradial canal. 
The dotted and striped regions represent similar portions of the canals in both 
figures. The interradial canals of Fig. C are supposed to be split to the infundibulum 
and united in the sagittal plane, the identity of the interradial canal being thus lost. 
