8 TABLE OF CONTENTS. 



For the Young Stages of Echinoderms, see 

 Plate I. tigs. 31, 34, 35, 36, Plate II. figs. 1, 3-7, 18-20, for Comatiila. 

 Plate 111. ligs. 14'-20, 24, 25, 31, 32, Plate IV. figs. 24, 26, 32, 34, for the Ophiuroidea (Aiiiphiura and Ophi- 



othrLx). 

 Plate X. fig. 4, Plate VI. figs. 4, 5, 9, 10, 13, 15, 17, 19, 20-22, 31, 32, 42, 47, 48, 50, 51, Plate VIII. figs. 8, 



10-12, 15-18, 25-28, for the Asteroidea (Asterina, Echinaster, Asteracauthion, and Pteraster). 

 Plate IX. figs. 36, 37, 44, 45, Plate X. figs. 40-44, Plate XI. figs. 26, 27, Plate XII. figs. 1-40, for the 



Eehinoidea (Arbacia, Stroiigyloceiitrotus, Ecliinus, Doroeidaris, Goniocidarls, Asthenosoma, Diadema, 



Jtellita, Echinoeyamus, Encope, Echinarachnius, Conolanipas, Spatangus. and Hemiaster). 

 Plate XIII. figs. 9-11, 29-31, 35-37; Plate XIV. figs. 21-27, Plate XV. figs. 10, 11, for the Holothuroidea 



(Synapta, Holothuria, and Cucumaria). 



