it being that pafct of the anterior enterocoele which 

 remains after the pouches have been out off which 

 will form the inner perihaemal and pert of the outer 

 perihiemal systems .Figs 24,25 and 2G.ax sin. 



It villi bo noted that beside the ampulla, which 

 is situated anteriorly to the stone canal, there are 

 two other fcavities near the stone canal to be ac- 

 ccunted for .Fig, °C.(sin a)andfsin b) . I car. not 

 be sure or their origin but I believe they also come 

 from the anterior enteroeoele. I have distinguished 

 the™ by the letters (a) and (b) as they are probably 

 the same cavities as those so lettered by MeBRIDE (0) 

 in his figures of Amphiura. 



The cavity ho has lettered (b'^sn: which he 

 thinks represents the pi-:ht hydrococle,I have been 

 unable to find in any of my sections. 



The stomach and oesophagus are in a condition 

 the same so we found in "E" ; that is, without lumen. 



