184 



LOWER INVERTEBRATES. 



the gullet, and between the latter and the cloaca the genital disc is situated. The ten 

 ambulacra diverge from the centre of the enlarged or aboral end of the body, and ex- 

 tend, like so many meridians, to near the neck of the flask. Each ambulacrum has 

 its own longitudinal muscular band, five of which are attached to the circle around the 

 anus, and five to that around the mouth. The species is found upon the Congo coast. 



W. N. LOCKINGTON. 



FlO. 162. — Aacbors and plates of Synapta girardii. 



