PLATE XXXI. 



EXPLANATION. 



Fig. 



I, 2. TiNTiNNUS Ehrenbergii, C. & L., vol. ii. p. 607, extended and contracted states, 

 X 150 (Claparfede & Lachmann). 



3. TiNTiNNUS URNULA, C. & L., vol. ii. p. 609, X 1 50. — At /r, a second peristome 



in process of development (Clap. & Lach.). 



4. TINTINNUS USSOWI, Meresch., vol. ii. p. 609, empty lorica, x 400 (Meresch- 



kowsky). 



5. TINTINNUS SUBULATUS, Ehr., vol. ii. p. 605, X 250 (Ehrenberg). 



6,7. TiNTINNIDIUM SEMICILIATUM, Sterki sp., vol. ii. p. 612. — At 7 an animalcule 

 isolated from its lorica, viewed in optical section, and showing at m outer 

 wreath of furcately branched cirrose cilia or membranellae, and at i inner 

 circlet of ordinary vibratile cilia, x 200 (Sterki). 



8. TiNTINNIDIUM FLUVIATILE, Stein sp., vol. ii. p. 611, X 200. 



9. TiNTINNIDIUM M.A.RINUM, S. K., vol. ii. p. 611, X 200 (Ehrenberg). 



10. TINTINNUS CINCTUS, C. & L., empty lorica, vol. ii. p. 608, x 250 (Clap. & Lach.). 



11. TINTINNUS CAMPANULA, Ehr., X 1 50. — At/r, a second peristome is in course of 



development, x 150 (Clap. & Lach.). 



12. TINTINNUS AMPHORA, C. & L., vol. ii. p. 606, X 150 (Clap. & Lach.). 



13. TINTINNUS QUADRILINEATUS, C. & L., vol. ii. p. 607, empty lorica, x iSo(Clap. 



& Lach.). 



14. TINTINNUS ACUMINATUS, C. & L., vol. ii. p. 606, empty lorica, x 200 (Clap. & 



Lach.). 



15. TINTINNUS INQUILINUS, Ehr., vol. ii. p. 604, X 300 (Clap. & Lach.). 



16. TINTINNUS MUCICOLA, C. & L., vol. ii. p. 605, X 1 50 (Clap. & Lach.). 



17. TINTINNUS sp. — Empty lorica, x 250 (Clap, and Lach.). 



18, 19. TINTINNUS DENTICULATUS, Ehr., vol. ii. p. 607.— 18, Empty lorica, x 150 ; 19, 

 portion of the same, x 800 (Clap. & Lach ). 

 20. TINTINNUS Steenstrupii, C. & L., vol. ii. p. 606, X 200 (Clap. & Lach.). 

 21,22. TINTINNUS lagenula, C. & L., vol. ii. p. 608.— 21, normal example, x 300; 

 22, lorica containing two zooids (Clap. & Lach.). 



23. TINTINNUS sp., C. & L., X 150 (Clap. & Lach.). 



24. TINTINNUS HELIX, C. & L., vol. ii. p. 608, empty lorica, x 150 (Clap. & Lach.). 



