EXPLANATION OF PLATE XXXIV. 

 FIG. 



1. RHABDOSTYLA RINGENS, From, sp., vol. ii. p. 666, x 150 (De Fromentel). 



2. SCYPHIDIA INCLINANS, D'Udk. sp., vol. ii. p. 659. a, Extended, and b, con- 



tracted zooid, dimensions unrecorded (D'Udekem). 



3, 4. RHABDOSTYLA SERTULARIUM, S. K., vol. ii. p. 665. 3, Short-stalked, and 4, long- 

 stalked varieties, 3 x 300. 



5, 6. RHABDOSTYLA OVUM, S. K., vol. ii. p. 664. Expanded and contracted zooids, 

 x 250. 



7. PYXIDIUM COTHURNOIDES, S. K., vol. ii. p. 667, x 350. 



8. RHABDOSTYLA BREVIPES, C. & L. sp., vol. ii. p. 665, x 300 (Claparede & Lach- 



mann. 



9. PYXIDIUM INCLINANS, Mull, sp., vol. ii. p. 667. a, Expanded, and b, contracted 



zooids, x 250 (De Fromentel). 



10. RHABDOSTYLA SPH/EROIDES, From., vol. ii. p. 666, x 200 (De Fromentel). 



11,12. RHABDOSTYLA NEBULIFERA, From., vol. ii. p. 665. 12, Example dividing by 

 longitudinal fission, x 100 (De Fromentel). 



13, 14. VORTICELLA BREVISTYLA, D'Udk., vol. ii. p. 675. 13, a, Expanded, and d, con- 

 tracted zooid, x 200 ; 14, encysted example (D'Udekem). 



15-19. VORTICELLA STRIATA, Duj., vol. ii. p. 684. 15, Two zooids, the one with a 

 lateral gemmulethe product of longitudinal fission, X 300; 16-19, successive 

 phases of detached germ, resulting in the last instance in the attachment and 

 development of a pedicle. 



20, 21. VORTICELLA NEBULIFERA, Ehr., vol. ii. p. 673. 20, Social group, showing at 

 a and b successive phases of longitudinal fission, and at c contracted zooid 

 with conjugating germ, x 200; 21, free-swimming zooid the product of longi- 

 tudinal fission (D'Udekem). 



22. VORTICELLA CRATERA, S. K., vol. ii. p. 679. Expanded and contracted zooid, 

 x 250 (D'Udekem). 



23, 24. VORTICELLA PUTRINUM, Mull., vol. ii. p. 684. 23, Expanded and contracted 

 zooid, the latter at a, two basally attached migrant zooids, the product of 

 repeated longitudinal fission, x 300 ; 24, free-swimming migrant zooid (fine 

 cross-striation of the cuticle accidentally omitted by the artist). 



25,26. VORTICELLA CRASSICAULIS, S. K., vol. ii. p. 676. a a, Extended, and bb, con- 

 tracted zooids, x 300. 



27. VORTICELLA HAMATA, Ehr., vol. ii. p. 687. a, Expanded, and b, contracted 



zooids, x 300. 



28. VORTICELLA NUTANS, Mull., vol. ii. p. 679, x 300. 



29. RHABDOSTYLA LONGIPES, S. K., vol. ii. p. 666. At b fully contracted zooid, x 200. 



30. VORTICELLA LONGIFILUM, S. K., vol. ii. p. 677, x 200. 



31,32. VORTICELLA TELESCOPICA, S. K., vol. ii. p. 677. 31, Extended, and 32, con- 

 tracted zooid,- x 250. 



33. VORTICELLA ALBA, From., vol. ii. p. 676. At a example with rudimentary 



pedicle, b contracted zooid, x 200. 



34. VORTICELLA QUADRANGULARIS, S. K., vol. ii. p. 685. At b contracted zooid, 



x. 125. 



35. VORTICELLA SPECTABILIS, S. K., vol. ii. p. 687. Social group, x 100. 



36. VORTICELLA CAMPANULA, Ehr., vol. ii. p. 678. At a expanded example, with 



the cuticle irregularly puckered, at b contracted zooid, x 100. 



