302 LIONKL JAMES PICTON. 



Polyninia nebulosa. 



Fig. 54. — Fusiform corpuscle. Alcohol, heemalum. -j^'. 



Fig. 55. — Fusiform corpuscle. Stained metliyl green and eosin. -^y. The 

 contained circular body is stained deeply with eosin, its " nucleus " blue 

 ■with methyl green. 



Fig. 56. — Vacuolated fusiform corpuscle. ^'. 



Fig. 57. — Amceboid corpuscle ; fresh, ^y. 



Figs. 58 and 59. — " Blood-corpuscles " of Polycirrus. Haemalum. ^'. 



Fig. 60. — New how-shaped corpuscles in Notomastus profundus. 

 Absolute alcohol, haemalum, eosin. ■^^'. 



Ophelia radiata. 

 Fig. 61. — Rod-cell, showing notches in rod. A (Zeiss). 

 Fig. 62. — Uod-cell, showing deciduous process. A (Zeiss). 



