DESCRIPTION OF PLA.TE J^.— continued. 



Fig. 8. — Transverse section of the body of the same, at a point a little 

 anterior to the position of the pliarynx. 

 e. Epidermis, e c m. External circular muscles, elm. External 

 lonsjiludinal muscles, p. Pigment layer, g. Glandular structures. 

 i. Main digestive canal, d d. Diverticula of the same, t r m. Trans- 

 verse muscular fibres, x. Lateral organ, od. Oviduct, t. Testis. 

 Fig. 9. — Portion of the foregoing section, much enlarged to show the 

 arrangement of the muscles in the inferior region of the body. 

 e. Epidermic layer, with its cilia, e c m. External circular muscular 

 layer, e I m. External longitudinal muscles, cut across, r m. Ra- 

 diating muscles, t r m. Transverse muscles. / m. Internal longi- 

 tudinal muscles, cut across. 

 Fig. 10. — Geoplana flava from Bahia, viewed from the dorsal surface. X 2. 

 Fig. 11. — Amoeboid cell from the same. 

 Fig. 12. — Various tissue elements of the same. 



Fig. 13.^— Vertical section of the, mucous membrane of the digestive diver- 

 ticula of the same, showing the ciliation and component cells. 

 Fig. 14. — Rod-cell from the same. Actual longer diameter "035 mm, in 



length. 

 Fig. 15. — Similar cell containing partly coi!ed-up rods. 

 Fig. 16. — Young rod-cell of the same, containing developing rods. 

 Fig. 17. — Long rods of the same, which have emerged from their cells. 

 Fig. 18. — Rynchodemus fiavus, viewed from the dorsal aspect. X IJ. 

 Fig. 19. — Bi/nchodemus fat^cics, viewed also from the dorsal aspect. X 3. 

 Fig. 20. — Rod-cell of Rynchodemua flaviis, showing coiled-up rods within. 

 Figs. 21 and 22. — Similar cells, with the rods partially protruded from the 



cell. 

 Fig. 23. — Rods of the same, which have emerged from the cells. 

 Fig, 24. — Section of the outer surface of the body of the same, as seen in 

 fresh condition after slight pressure has been exerted on the 

 section and the rods have thus been caused to be shot out. 

 a a. Protruded rods, b b. Contents of slime glands discharged, 

 e. Epidermis, with short cilia. 

 Fig. 25. — Vertical section in the region of the body, anterior to the position 

 of the pharynx of Dolichoplana Philippensis. 

 e. Epidermis, e c m. External circular muscles, e I m. External 

 longitudinal muscles. p p. Pigment patches, t r m. Transverse 

 muscles. r m. Radiating muscles. i I m. Internal lougituiiinal 

 muscles, a. Special layer of internal longitudinal muscles, b. Special 

 layer of transverse muscles. I. Main digestive canal, d d d. Diver- 

 ticula, od. Oviduct, t. Testis, x. Lateral organ. 



