SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. Ill 



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Figs, i to 5. — All the figures are traced from Heider's ; and the present author's inter- 

 pretation is added on the right side of figures 3, 4, and 5. 



Fig. I. — (After Heider's fig. 7.) Diagrammatic longitudinal vertical section through 

 the anterior part of Eunice punctata. The oesophagus and the median plane ganglia are 

 shown in median section; but the brain and the jaw sacs are represented as cut at one 

 side of the median. X 12. 



Fig. 2.— (After Heider's fig. 10.) Oblique cross section from the third segment behind 

 the peristome on the dorsum forward to the lower lip. X 20. 



Fig. 3. — (After Heider's fig. 13.) Brain of Eunice punctata, ventral aspect. Ca. X 20. 



Fig. 4. — (After Heider's fig. 15.) Dorsal view of the brain and the anterior parts of 

 the central nervous system and visceral nervous system of Eunice punctata. Ca. X 10. 



Fig. s.— (After Heider's fig. 16.) Side view of the same. Ca. X iS- 



