No. 3-] THE NEURAL GLAND IN ASCI DT A ATRA. 145 



Fig. /// 



EXPLANATION OF FIGURES. 







FIG. i. Dorsal view of ganglion and neural gland with its duct. 



FIG. 2. Cross section through ganglion and neural gland at the point marked // in Fig. i. 

 FIG. 3. Cross section through the duct of the neural gland at the point marked /// in Fig. i. 

 FIG. 4. Cross section through one of the accessory glands at the point marked //"in Fig. i. 

 Fig. i is a reconstruction from serial sections, and is magnified about nine times. 



