EXPLANATION OF PLATE XLIV. 



FIG. 



i, 2. STICHOTRICHA SECUNDA, Perty, vol. ii. p. 776. i, Zooid projecting from its 



mucilaginous sheath ; 2, isolated animalcule in ventral aspect, x 250 



(Stein). 



3. STICHOTRICHA ACULEATA, Wrz., vol. ii. p. 777. Ventral aspect x 500 (Wrzes- 

 niowski). 



4-8. SCHIZOSIPHON SOCIALIS, Gruber sp., vol. ii. p. 778. 4, pendent dichotomously 

 branching colony-stock or zoothecium with terminally enclosed zooids, x 60 ; 

 5, an isolated animalcule, x 240 ; 6, an example dividing by transverse fission 

 within its tube ; 7, termination of tube temporarily occupied by two zooids ; 

 8, a colony-stock, natural size (Gruber). 



9, 10. STICHOTRICHA REMEX, Hudson, vol. ii. p. 777. 9, Animalcules projecting in 

 various positions frdm their cylindrical sheaths, X 40 ; 10, an isolated zooid, 

 x 150 (C. S. Hudson). 



11. STICHOTRICHA CORNUTA, C. & L., vol. ii. p. 776. Zooid in ventral aspect, x 



400 (Claparede & Lachmann). 



12. OXYTRICHA TUBICOLA, Gruber, vol. ii. p. 789. Zooid enclosed within its tube, 



x 200 (Gruber). 



13, 14. STICHOCH^ETA PEDICULIFORMIS, Cohn, vol. ii. p. 775. 13, Ventral, and 14, 

 lateral aspects, x 500 (Cohn). 



1 5, 16. AMPHIBIA GIBBA var. CRASSA, C & L. sp., vol. ii. p. 768. Ventral, and lateral 

 aspects, x 200 (Claparede & Lachmann). 



17, 18. OXYTRICHA SCUTELLUM, Cohn, vol. ii. p. 788. Extended and contracted zooids, 

 x 360 (Cohn). 



19, 20. OXYTRICHA VERUGINOSA, Wrz., vol. ii. p. 787. 19, Ventral and 20, lateral 

 aspects, x 150 (Wrzesniowski). 



21. HOLOSTICHA OCULATA, Meresch. sp., vol. ii. p. 770. Ventral aspect, dimensions 



unrecorded (Mereschkowsky). 



22. EUPLOTES HARPA, Stein, vol. ii. p. 799. Ventral aspect, x 150 (Stein). 



23-25. EUPLOTES PATELLA, Ehr., vol. ii. p. 798. 23, Dorsal, and 24, ventral aspects, x 

 200 (after Stein) ; 25, lateral aspect (Dujardin). 



26-29. EUPLOTES CHARON, Miill. sp., vol. ii. p. 799. 26, Ventral view, x 300 ; 27, 

 example dividing by transverse fission ; 28, encysted zooid (Stein). 



30, 31. STYLOPLOTES APPENDICULARIS, Ehr. sp., vol. ii. p. 800. Dorsal and ventral 

 aspects, x 300 (Stein). 



