0)1 a Neiv Species of Cothurnia. Bij John Davis. 655 



fully protrude for some time, which makes them very difficult to 

 examine. They are all solitary and very sluggish. I have never 

 been able to cause them to imbibe coloured matter. 



Size, about aao of an inch, including the footstalk, when full 

 grown. 



Fig. 3 shows a young animal growing on the lorica of an adult ; 

 no trace of an operculum could be seen in this individual. Fig. 5 

 shows the first apj)earance of an operculum in a rudimentary form, 

 seven hours afterwards. The young are always colourless and 

 transparent, and show no signs of corrugation of their loricae. 



Fig. 4 is the appearance of the distal end of the young animal 

 eight hours after that in Fig. 3, showing a wreath of cilia. 



If this species is new, I propose calling it Cothurnia corrugata. 



2x2 



