PLATE XXIV. 



EXPLANATION. 



Fig. 



i-io. DiPLOMASTlx CAUD.\TA, Duj. sp., vol. i. p. 432.— I, Typical adult form, x 800 ; 

 2 and 3, examples with prolonged posterior extremities ; 4, conjugation of 

 two animalcules ; 5, spore-groups, imbedded in decaying hay-fibre, at a a 

 two unillagellate, monadiform germs, produced from the same, x 1000 ; 6, 

 sporocyst with four rounded macrospores, x 1000 ; 7, group of elongate 

 spores, with cyst-wall dissolved, x 1000 ; 8, sporocyst with germ emerging, 

 after Stein ; 9 and 10, animalcule ingesting and having ingested a baciUus 

 filament, after Stein. 



II, 12. DiPLOMASTlx SALTANS. Ehr. sp., vol. 1. p. 433, X Soo (Stein). 



13. DiPLOMASTlx AFFINIS, S. K., vol. i. p. 433, X 800. 



14, 15. Heteronema acus, Ehr. sp., vol. i. p. 430, x 400 (Stein). 



16, 17. Heteronema globuliferum, Ehr. sp., vol. i. p. 430, x 400 (Stein) 



iS-20. Sphenomonas OCTOCOSTAta, St. sp., vol. i. p. 439 (Stein).— 18 and 19, Lateral 



and ventral aspects, x 400 ; 20, quiescent or encysted phase. 

 21-23. Sphenomonas quadrangularis, St., vol. i. p. 43S (Stein).— 21, Normal adult 



type, X 400 ; 22, the same viewed vertically to its long axis ; 23, zooid 



dividing by longitudinal fission. 



24, 25. Anisonema TRUNC.A.TUM, St., vol. i. p. 435 (Stein).— 24, Dorsal, 25, ventral, 

 aspects, X 450. 



26-30. Anisonema Grande, Ehr. sp., vol. i. p. 434. — 26, Axial, and 27, dorsal, aspects, 

 X 400, the four flagella present in the last figure indicate approaching fission 

 (after Jas.-Clark) ; 28 and 29, dorsal and ventral aspects, the zooid in the 

 first instance containing two germinal masses, x 450, after Stein ; 30, zooid 

 after O. Biitschh. 



31-34. Entosiphon SULCATUM, Duj. sp., vol. i. p. 437 (Stein), X 400.— 31, Zooid 

 enclosing ovate germ-mass ; 32, living, and 34, dead examples, with their 

 horny pharyngeal tubes protruding. 



35,36. Anisonema ludieundum, S. K., vol. i. p. 435, x 1200.— 35, Animalcule in 

 lateral view discharging fascal matter from its posterior extremity ; 36, 

 dorsal aspect, showing the two anteriorly located contractile vesicles. 



37-39. Anisonema intermedium, S. K., vol. i. p. 436.-37 and 39, dorsal and lateral 

 aspects, X 1 200 ; 28, two young animalcules, possessing as yet only a single 

 posterior anchoring flagellum, or gubernaculum, x 1 200. 



40-42. Sterromonas formicina, S. K., vol. i. p. 420.— 40 and 41, Dorsal and lateral 

 aspects, X 1 200 ; 42, encysted state. 



