BRANCH ECH1NODERMATA : STARFISHES, ETC. 109 



support certain very small pincer-like processes, the pedi- 

 cellarice. In the interspaces between the calcareous plates 

 are soft fringe-like projections of the inner body-lining, the 



-eye spot 



''cardiac stomach 



r^V^" " - intestinal caecu. 



pyloric caecuik 

 ' muscles of tht pyloric caeca 



eye spot--' 



FIG. 18. Dissection of a starfish (Asterias sp.). 



respiratory cceca. Note at the tip of each arm or ray a 

 cluster of small calcareous ossicles and within each cluster 

 a small speck of red pigment, the eye-spot or ocellus. 



