NERILLA AN ARCHIANNELID. 
425 
Fig. 19 b. — Enlarged view of the granular cells of the seventh segment 
of a <£ . 
Fig. 20. — Diagram of a longitudinal section of a . 
Fig. 21. — Transverse section of a ^ through the fifth segment. Z. 
3 mm. oil imm., oc. 3. cam. 
Fig. 22. — Transverse section of the same through the fifth segment ; 
cutting the funnel of the sperm- duct. 
Fig. 23. — Transverse section of the same through the seventh segment. 
Fig. 24. — Transverse section of the same through the genital atrium. 
Fig. 25. — Transverse section of the same through eighth segment. 
Fig. 26. — Transverse section of the same through the degenerate 
testis of the seventh segment. 
PLATE 41. 
Fig. 27. — Transverse section of a $ through the fifth segment. Z. 
3 mm. apoch., oc. 4 cam. 
Fig. 28. — Transverse section of the same through the sixth segment. 
Fig. 29. — Transverse section of the same through the sixth segment, 
further hack. 
Fig. 30. — Transverse section of the' same through the sixth segment, 
further hack. 
Fig. 31.— Transverse section of the same through the sixth parapodium. 
Fig. 32. — Transverse section of the same through the funnels of the 
oviducts. 
Fig. 33. — Transverse section of the same through the oviducts in the 
seventh segment. 
Fig. 34. — Transverse section of the same through the seventh segment, 
further hack. 
Fig. 35. — Longitudinal section through the head region, nearly 
median. Z. D., oc. 4, cam. 
Fig. 36. — Ventral portion of transverse section passing through the 
front end of the ovaries. Cam., Z. 3 mm., oc. 8. 
Fig. 37. Transverse section passing through the muscular pharynx. 
Cam., Z. D., oc. 4. 
