282 
FRANK E. BEDDARD. 
PLATE XXIV. 
Fig. 12. — Perichscta aspergillum. Nephridial tube, a, with larger, 
b, with smaller lumen. 
Fig. 13. — Deinodrilus Benhami. Nephridial tubes from posterior 
segment. 
Fig. 14. — Acanthodrilus multiporus. Nephridial tubes, a, with 
small lumen; b, with wider lumen ; c, represents the greatest size to which 
the nephridial tubes of this species reach. 
Figs. 11 — 14 are all carefully drawn to scale with camera lucida. 
Fig. 15. — Diehogaster. General view of genital segments dissected. 
The upper wall of the semiual reservoirs is removed on the left side to show 
the funnels and testes, r. Seminal reservoirs, r'. Seminal reservoirs of a 
racemose appearance. 1. Testes, f. Funnel of vasa deferentia. o. Ovary. 
od. Oviduct. 
Fig. 16. — Transverse section of body of the same worm at the line of the 
atria ( pr .). v. d. Vasa deferentia joining the muscular portion of atria. 
Fig. 17. — Corresponding section through nineteenth segment, pr 1 . Glan- 
dular body. 
Fig. 18. — Spermatheca with appendix, a. 
Fig. 19. — Transverse section through wall of spermatheca. 
Fig. 20. — Transverse section through appendix of spermatheca. 
Fig. 21.— Anterior region of alimentary canal, to show two gizzards,^., and 
calciferous glands, Ca. 
Fig. 22. — Ova of different species of Oligochacta, to illustrate their relative 
sizes. Drawn to scale, a. Of Uroclueta corethrura, from ccelom. a 1 . 
Largest ova from ovary, b. Of Phreoryctes Smithii, from ovary, c. 
Of Allurus. c. From receptaculum ovorum. d. From ovary, d. Of 
Eudrilus, from ovary, e. Of Acanthodrilus, from ovary. 
Fig. 23. — Fragment of cuticle of Perichaeta aspergillum, a. Orifices 
of setae, b. Nephridiopores. 
Fig. 24. — Perichaeta aspergillum. Diagram to illustrate nephridia of 
posterior segments, o. Nephridiopore. f Funnel. 
