89 
/ 
Fig. 1d 9.— Transverse section of head region of S. proliferum: ex. c., excretory canals; n., lateral 
nerves, x 100. (After Ijima, 1905, fig. 16.) 
Figs. 1C0-161. Longitudinal section of (160) head and (161) near posterior end of S. proliferum: cal., 
calcareous corpuscles; ex. c., excretory canals, x 50. (After Ijima, 1905, fig. 21.) 
