84 ■ BuivLKTiN 5 . 354 



296 



I think it highly probable that the branchial ap- 

 paratus communicated with the surrounding fluid 

 through the pores of the ambulacrae, by means of 

 filamentous processes ; these may also have per- 

 formed the office of tentacula in conveying the 

 food to the mouth, which was, perhaps, provided 

 with an exsertile proboscis ; or may we not rather 

 suppose that the animal fed on the minute beings 

 that abounded in the sea water, and that it obtain- 

 ed them in the manner of the Ascidia, and by tak- 

 ing them in with the water. The residuum of 

 digestion appears to have been rejected through 

 the mouth. 



[J. A. N. S., Phila., ist Ser., Vol. IV, 1825.] 



