274 FRANK E. BEDDARD. 



EXPLANATION OF PLATES XVI— XX, 



Illustrating Mr. Frank E. Beddard's memoir '^On the Struc- 

 ture of Two New Genera of Earthworms belonging to the 

 Eudrilidse, and some Remarks on Nemertodrilus." 



PLATE XVI. 

 Hyperiodrilus africanus. 



Fig. 1. — Female reproductive apparatus, seen after opening body-wall from 

 above and removing one of the calciferous glands, ca. Calciferous gland. 

 sp' . Large coelomic pouch, connected with a perioesophageal ring. r. o. Re- 

 ceptaculum ovorum. od. Oviduct, oes. (Esophagus, d. v. Dorsal vessel. 

 5. Intersegmental septum. 



Fig. 2. — Integumental sense (?) organs in longitudinal section. 



Fig. 3. — The same in situ. Transverse section. This drawing also 

 shows the lymph-spaces between the fibres of the circular muscular coat. 



Fig. 4. — Diagram of structure of the same. 



Fig. 5. — Diagrammatic lateral view of the different parts of the female 

 reproductive apparatus. The segments are numbered, sp. Spermatheca. 

 ov. Ovary. Other letters as in Fig. 1. The walls of the coelomic spaces are 

 here and there cut away so as to display the contained viscera. 



Fig. 6. — Anterior segments from above, to show form of prostomium. 



Fig. 7. — A portion of integument, highly magnified, to show relationship 

 of nephridiopore {np.) to seta (s.) of dorsal pair. 



Fig. 8. — Female reproductive apparatus removed from body, but with its 

 relations to other organs indicated. /3. Bursa. Other letters as in 

 Figs. 1 and 5. 



Fig. 9. — Transverse section to show arrangement of setae. 



Fig. 10. — Transverse section through a portion of perigonadial sac and the 

 neighbouring body-wall. ?i. Nephridium. Other lettering as in Fig. S. 



Fig. 11. — Diagrammatic view of female reproductive organs. The peri- 

 oesophageal sinuses and the unpaired dorsal sac in which they meet are pushed 

 back ; the oesophagus is cut away, but the nerve-cord is left. On the left 

 side the anterior wall of perigonadial sinus and perioesophageal sinus is 

 removed in order to display enclosed viscera. The segments are numbered. 

 Lettering as in Figs. 1, 5, and 8. 



Fig. 12. — A few segments pressed out to show arrangement of setae («.) 

 and position of nephridiopores («.) by lateral setae. 



