STRUCTCJRE OF THREE NEW SPECIES OF EARTHWORMS. 131 
PLATE XIII. 
Eig. 1. — Typhaeus Gammii. Penial seta. 
Pig. 2. — Typhaeus orientalis. Penial seta. 
Pigs. 3 — 10. — Deinodrilus Benhami. 
Pig. 3. Ventral view of genital segments, cl. Clitellum. 
Fig. 4. Pirst three segments of the body. 
Pig. 5. Spermatheca. 
Fig. 6. Transverse section through dorsal blood-vessels, m. Muscular 
layer of blood-vessel, p" . Peritoneal covering, p'. Peritoneal lining 
of perihaemal space, p. Peritoneal covering of perihaemal space. E. 
Intestinal epithelium, bl. Blood-space, t. Peritoneal cells covering 
intestine. 
Pig. 7. Longitudinal section of the same, lettering as above. 
Pig. 8. Typhlosole in transverse section. 
Pig. 9. Diagrammatic section of body, to illustrate arrangement of setae. 
Pig. 10. Transverse section through body wall. 
Pigs. 11 — 12. — Acanthodrilus annectens. 
Pig. 11. Spermatheca. 
Pig. 12. Transverse section through pore of vasa deferentia and apertures 
of atria, v. d. Vas deferens, p. Atrium of seventeenth segment. 
£ aperture of vas deferens, m. Intersegmental septa, at. Atrial 
pore of nineteenth segment. 
Pig. 13. — Transverse section through atrium of Perichaeta Newcombei. 
a. Peritoneal covering, b. Glandular cells, c. Lining epithelium. 
Fig. 14. — Transverse section through atrium of Acanthodrilus ; lettering 
a3 above. 
Fig. 15. — Atrium of Perichaeta Newcombei, drawn with camera lucida. 
vd. Vas deferens. 
Fig. 16. — Longitudinal section of part of atrium of Deinodrilus 
Benhami; lettering as in Pig. 13. 
