746 EDWIN S. GOODEICH. 



'Figs. 10, 11, and 12. — Three sections of the nephridium of Eteone 

 siphonodonta. Fig. 10 from a transverse section, and fig. 11 from a longi- 

 tudinal, show the subdivision of the lumen into primary and secondary canals. 

 Fig. 12, from a longitudinal section, shows the rudimentary genital funnel. 

 Cam. D, oc. 3. 



Fig. 13. — Enlarged view of a portion of the inner end of the nephridium of 

 Phyllodoce laminosa. 



Fig. 14. — Inner branched end of the nephridium of Phyllodoce 

 paretti. Cam. D, oc. 3. 



Figs. 15, 16, and 17. — Three transverse sections, from behind forwards, of 

 the nephridial duct and genital funnel of an immature Eulalia punctifera. 

 Cam. D, oc. 3. 



PLATE 39. 



Fig. 18. — Longitudinal vertical (sagittal) section through three segments of 

 a ripe male, Eteone lac tea, showing the genital funnels opening into the 

 nephridial ducts. Cam. 



(In this and the next two figures the spermatozoa are not represented.) 



Fig. 19. — Similar section through a ripe male Irma latifrons. Cam. A, 

 oc. 3. 



Fig. 20. — Similar section through a ripe male Pionosyllis, sp. Cam. A, oc. 3. 



Fig. 21. — Similar section through an immature Eunice sanguinea. 



Fig. 22. — Longitudinal horizontal (frontal) section through Ophiodromus 

 flexuosus, immature female. The ova are shown in one segment only. Cam. 

 L. 4, oc. 3. 



PLATE 40. 



Figs. 23 and 24. — Longitudinal vertical sections through a ripe male 

 Eulalia punctifera; from sections lent by M. Gravier. Solenocytes are 

 seen in the second figure only. Cam. A, oc. 3, 



Figs. 25 and 26. — Two longitudinal sections through the junction of the 

 same genital funnel with the nephridium in a segment of an immature female 

 Ophiodromus flexuosus. Cam. D, oc. 4c. 



Fig. 27. — Half a transverse section of an immature male Eulalia 

 punctifera (cf. Figs. 23 and 24) showing the nephridia, and developing 

 genital funnel. The lower nephridium is cut through near its external 

 aperture, the upper one near its anterior blind extremity. Cam. AA, oc. 2. 



Fig. 28. — Longitudinal section through the junction of the genital funnel 

 and the nephridial duct in an immature male Eulalia punctifera (the same 

 specimen is represented in Fig. 27). Unripe spermatozoa are seen in the 



