PLATE XL VIII. 



EXPLANATION. 



Fig. 



1-4. Urnula epistylidis, C. & L., vol. ii. p. 807.— I, Normal zooid with extended 

 tentacula, x 200 ; 2, zooid in a resting or encysted state, its body-substance 

 having subdivided into four germinal fragments ; 3, example with contained 

 ciliated embryo ; 4, isolated ciliated embryo, x 300 (Clap. & Lach.). 



5. PODOPHRYA LIMBATA, Maupas, vol. ii. p. 816. — Typical zooid with peripheral 

 gelatinous film, x 200 (Maupas), 



6, 7. Sph^ROPHRYA magna, Maupas, vol. ii. p. 808.— 6, Zooid having seized and in 

 the act of devouring by suction half a dozen examples of Colpoda parvifrons, 

 X 300 ; 7, two tentacles, that at a with a central hyaline vacuosity, and that 

 at b having the substance of its terminal sucker lacerated through the 

 temporary adhesion and subsequent escape of a ciHated infusorium, x 1280 

 (Maupas). 



8-1 i<z. ACINETA divisa, Fraipont, vol. ii. p. 836.-8, Normal zooid with, at a. a single 

 anteriorly developed, pyriform germ-capsule, from which a ciliated embryo 

 is in the act of emerging, x 300 ; 9, germ-capsule with, at op, operculum- 

 like differentiation through which the embryo ultimately emerges ; 10, 

 cihated embryo, x 600; 11, abnormally elongated zooid with central band- 

 like endoplast ; \\a, empty lorica with, at s, platform-like horizontal septum 

 upon which the body of the animalcule ordinarily reposes (Fraipont). 



12. AciNETA LIVADIANA, Meresch., vol. ii. p. 828. — Adult zooid, x 250, as observed 

 by the author. 



13-17. AciNETA FCETIDA, Maupas, vol. ii. p. 832. — 13, Normal adult animalcule, x 580 ; 

 14, lorica with tentacular fascicles as seen from above; 15 and 16, ciliated 

 embryos ; 17, young zooid with imperfectly developed lorica (Maupas). 



18. AciNETA EMACIATA, Maupas, vol. ii. p. 837, X 300 (Maupas). 



19. Hemiophrya Thouleti, Maupas, vol. ii. p. 826, x 200 (Maupas). 



20. Podophrya cylindrica, Perty, vol. ii. p. 814, x 250 (Mereschkowsky). 



21,22. Podophrya elongata, C. & L., vol. ii. p. 820. — 21, Normal zooid, with at aaa 

 tentacles partially retracted and exhibiting a spirally convolute aspect ; 

 X 150; 22, one such tentacle as observed by the author, x 800, showing 

 that the spiral aspect is due to the presence of a superficial spirally developed 

 granular crest or film. 



23. Podophrya carchesii, C. «& L., vol. ii. p. 818, x 200. 



