PLATE XXXI . 



EXPLANATION. 



Fig. 



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

 X 150 (ClaparMe & Lachmann). 



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



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



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



kowsky). 



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



6 7. TiNTlNNiDlUM 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 membranellse, 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 MARINUM, S. K., vol. ii. p. 611, X 200 (Ehrenberg). 



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



11. TiNTlNNUS CAMPANULA, Ehr., X 150. — At/r, a second peristome is in course of 



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



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



13. TiNTlNNUS QUADRILINEATUS, C. & L., vol. ii. p. 607, empty lorica, x 150 (Clap. 



& Lach.). 



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



Lach.). 



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



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

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

 TiNTlNNUS DENTICULATUS, Ehr., vol. ii. p. 607.— 18, Empty lorica, X 150 ; 19, 



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

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

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



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



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



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



