232 



lateral anastomoses -ffitli the genus Ctenis, and the lower siu-faee 

 of tke segments was found to be covered witli small circular 

 projections regarded by Schenk as siDorangia. The preservation 

 of the specimen did not permit of -xaj microscopical examination of 



Fig. 42. — Ctciiis, sp. (Nat. size.) From a specimen in the Manchester 

 Museum (No. 53). 



[I am indebted to the Literary and Philosophical Society of Manchester for the 

 use of the hlocks from -which Figs. 42 and 43 have heen printed.] 



the epidermal cells or ' sporangia.' Additional evidence bearing 

 on the systematic position of Ctenis has been furnished in recent 



