TUBULARIA. 41 



Fig. 7. A hydra, generated at right angles to the stem, from an artificial 

 cleft of a different specimen — none of the preceding. 



8. Another hydra, generated from the same cleft, after the former 



feU. 



9. A third hydra, generated from the same cleft, the parts originally 



distorted, having now become sjonmetrical. 



1 0. Hydra, generated from the lower half of fig. 7, which had been 



sundered. 



11. Hydra, generated in succession to fig. 10, from the summit of the 



same lower section. 



12. This figure, originally the lower section of fig. 7, remained the 



upper part of fig. 10, after this fig. 10. lost its own lower half. 

 The vacant summit a had borne the hydra of fig. 11, and now 

 when that hydra had fallen, a hydra c sprung from the oppo- 

 site or lower extremity, contrary to the course of nature, and 

 then gradually rose upwards. 



13. Ultimate appearance of fig. 12, in decay, after losing the hydra 



from c. 



1 4. Hydra, generated in the natural direction, from the lower half of 



fig. 10. 



15. Second hydra, succeeding fig. 14. 



1 6. Monstrous hydra, issuing through an excision of a part of a stalk. 



17. Monstrous hydra, issuing through an excision of the stalk of an- 



other specimen. 

 IS. Monstrous hydra, issuing from an excision of a third stalk. 



19. Reproduction from a cleft stalk — hydra displayed — hydra in em- 



bryo 5. 



20. The same, a, having decayed, and 5 having unfolded. 



21. A stalk cleft, October 24. 



22. The same, with an obscure embryonic formation, November 4. 



23. The same, with the preceding formation developed as a monstrous 



hydra, November 6. 



24. The same, as appearing November 7. 



25. A stalk, apparently monstrous by nature. 



26. Another stalk, apparently monstrous by nature. 



VOT„ I. 



