EXPLANATION 



OF 



PLATES II -IV. 



be. buccal cavity; bl. bloodvessels; c. supra-oesophageal ganglion; le. cephalic lobe; 

 d. diverticulum; dv. dorsal vessel; e. eggs; g. gizzard; gl. glandular layer of clitellum; 

 Im. longitudinal muscles; mg. mucous gland; ml. muscular layer; n. nephridium; nc. ventral 

 nerve-cord; np. nephridial porus; o. ovary; od. oviduct; oe. oesophagus; ph. pharynx; 

 pr. prostata; ro. receptaculum ovorum; s. seminal vesicle; sd. spermduct; si. sacculated 

 intestine; sp. spermatheca; sv. supraueural-vessel; t. testis; tm. transversal-muscles; 

 Is. typhlosolis; vv. ventral- vessel ; x. problematical organ. 



Fig. 12. Penial setae. Highly magnified. 



Fig. 13. Spermatheca. Magnified. 



Fig. 14. Spermatheca of Benhamia Bolavi 

 Mich. X 90 diam. 



Figs. 15-19. Objphidrilus Weberi n. sp. 



Fig. 15. Latero- ventral view of the anterior 

 end of an individual, showing the shape 

 of the clitellar ridges and the distribution 

 of the setae. X 3 diam. 



Fig. 16. General view of the internal or- 

 gans of the worm, opened from the 

 dorsal side. X 6 diam. 



Fig. 17 A portion of a transverse section 

 through the modified epidermis of the 

 clitellum, to show the structure ot a 

 puberty-groove. X 90 diam. 



Fig. 18. A transverse section through the 

 body- wall of segment XXVII, to show 

 the structure of the clitellar ridges and 

 the distal extremities of the spermducts. 

 X 18 diam. 



Fig. 19. Dorsal view of the anal extre- 

 mity. X 10 diam. 



PLATE II. 



Figs. 1 — 5. Benhamia Annae u. sp. 



Fig. 1. Transverse section through the 

 body-wall of the eigtheenth segment. 

 X 28 diam. 



Fig. 2. Ventral view of the clitellar seg- 

 ments, to show the area ot the prostate- 

 pores. X 10 diam. 



Fig. 3. a. Penial seta. X 175 diam. b. Ex- 

 tremity of the same seta, highly magnified. 



Fig. 4. Spermatheca. Magnified. 



Fig 5. Longitudinal section through the 

 spermatheca. Magnified. 



Figs. 6 — 9. Benhamia floresiana n. sp. 



Fig. 6. Dorsal view of the anterior seg- 

 ments. Magnified. 



Fig. 7. "Ventral view of the clitellar seg- 

 ments, to show the area of the prostate- 

 pores. X 10 diam. 



Fig. 8. Penial setae. X 175 diam. 



Fig. 9. Spermatheca. Magnified. 



Figs. 10 — 13. Benhamia malayana n. sp. 



Fig. 10. Dorsal view of the anterior seg- 

 ments. Magnified. 



Fig. 11. Ventral view of the clitellar 

 segments , to show the area of the prostate- 

 pores. X 10 diam. 



PLATE III. 



Fig. 20. Olynhidrilus Weberi n. sp. 

 A portion of a longitudinal section through 

 Segment XIII, showing the position of 



