190 E. S. Goodrich, Observation on the Nephridia of the Alciopinae. 



Explanation of the figures. 



est coelomostome and coelomoduct sol solenocyte 



nd nephridial duet sp spermatqzoon 



neplt nephridium spt septum 



pt point of junetion of the coelomo- w wall of nephridial duet 

 stome with the nephridial duet 



Plate 12. 

 Figures 1 — 12 are drawn from living speeimens. 



Figs. 1, 2, and 3. Enlarged views of the inner end of the nephridium 

 and of the growing coelomostome in three segments of an immature % 

 Alciope hrohnii. Fig. 1 is drawn from the 9th segment, Figs. 2 and 3 

 from more posterior segments. 



Fig. 4. Similar view of the nephridium and coelomostome from a 

 segment in the mid-region of the body of the same worm. 



Fig. 5. Similar view of the nephridium and coelomostome from a 

 segment of a full-grown 5 Alciope eantrainii. 



Fig. 6. Portion of the nephridial duet in the 19th segment of an 

 immature Alciope eantrainii. L. 1 j io Oil Imm., Oc. 3. 



Fig. 7. Portion of the modified nephridial duet of a mature $ 

 Alciope eantrainii. L. ] / J2 Oil Imm., Oc. 3. 



Fig. 8. Enlarged view of the nephromixium of a $ Alciope ean- 

 trainii. Drawn with a Camera. 



Fig. 9. Similar view of the nephromixium of one segment and part 

 of another in a not quite mature $ Aster ope Candida. Cam. 



Fig. 10. Mid-region of the coelomoduct and nephridial duet of same 

 worm. The nuclei have been added from a stained preparation. L. 1 / 12 Oil 

 Imm., Oc. 3. 



Fig. 1 1 . Enlarged view of the point of junetion between the coelomo- 

 duct and the nephridial duet in a $ Asterope Candida. 



Fig. 12. Similar view of this region of the nephromixium after the 

 communication between the two organs has been established. 



