468 



Fig. 1. Sagittal section of the ganglion and neural gland of Cynthia papulosa. 



Note the dorsal position of the gland ; its rapheal prolongation, greater in bulk 

 than the gland proper. The great elongation of the ganglion and gland is characteristic 

 of the Cynthiinae. 



hr. n. nerve to branchial siphon ; c. /. ciliated funnel, much coiled therefore cut in 

 three places; cl. ep. cloacal epithelium; d. duct of neural gland; d. r. dorsal raphe; 

 ec. ectodermal epitiielium of the outre surface of the body; gg. ganglion; gl. neural gland; 

 ph. ep. pharyngeal epithelium; r. g. rapheal prolongation of neural gland; r. n. rapheal 

 nerve cord ; x point of union between the neural gland and its rapheal prolongation. 



de,, 





. (i eß. 



Fig. 2. Portion of sagittal section of the neural gland. 



Observe that the inner contour of the cells of the dorsal epithelium of the gland 

 [d. ep ) is not distinct. These cells are actively proliferating the cells y, many of which 

 have fallen down against the ventral epithelium of the gland (v. ep.). Observe that the 

 inner contour of the latter is distinct, showing that these cells do not share in the form- 

 ation of the cells y. The cells y are in different stages of degeneration (of. Fig. 3) 



d. ep. dorsal epithelium of neural gland; gg. dorsal contour of ganglion; I. lumen 

 of gland; v. ep. ventral epithelium of gland; y cells degenerating to form the secretion 

 of the gland. 



