TRArHl-JJrs O^UM. 



1T9 



by masses that did not present the same regular 

 form or rounded outline. In one instance an 

 amorphous structure of this kind gradually divided 

 itself, and seemed in the course of forming two 

 cells, but the end of the process was unfortunately 

 not seen. The annexed drawing will readily enable 

 the animal to be recognised. It shews the mouth 



cCTx 



Trachelius ovum- slig-htly flatter.ecL 



very plainly, and a current of small particles 

 moving towards it. The oesophagus terminates in 

 a digestive tube, like the trunk of a tree, from 

 which numerous brandies spring. This arrangement 

 is probably analagous to that of the phlebenterous 

 mollusks described by Quatrefages, in which the 



