24 THE ZOOLOGIST. 



encircles itself with a collar about one inch in depth of slime 

 set thickly with particles of sand." 



Now, when in either of these positions, the Peachia can still 

 feed by the ciliary incurrent stream, which can also serve for 

 respiration. There is no ciliary current noticeable on the 

 column, and only a very faint incurrent between the tentacles. 

 It is interesting to note how similar is this ciliary mode of 

 feeding to that of Cockles and other sand-dwelling animals. 

 The part of the Southannan sands where we usually get Peachia 

 is a place where Diatoms and small algse are often so abundant 

 as to discolour the surface of the sand when the tide is out. 

 The incurrent ceases when the Peachia is closed, and ceases for 

 a while when partly closed after an alarm. 



