62 VERMES. 



PLATE VI. 



FIG. 1. Gordius fragilis in motion. 



2. Transverse section, shewing the shape of the body. 



PLATE VII. 



FIG. 1. Gordius fragilis quiescent. 



2. Anterior part ; under surface, shewing the site and appearance of 



the mouth. 



3. Portion sundering from the body, October 1 1 . 



4. The same in motion, October 15, having previously lost the frag- 



ment, fig. 10. 



5. The same, having generated a papilla at the extremity. In motion, 



December 19. 



6. The same (denominated A), as appearing April 14, after losing two 



portions. 



7. One of these portions separated from fig. 6. 



8. Another of these portions separated from fig. 6. 



9. Appearance of fig. 3, A, as on May 3. 



10. Fragment, which had separated from 'fig. 4 on the preceding Octo- 



ber 14. 



11. Portion B, as appearing 27th November, or thirty-eight days after 



having sundered from the Gordius. 



12. The same as advancing, December 19. 



13. The same, with its generated appendages, 100 days old, January 28. 



14. The same, as advancing April 14. 



15. Spontaneous mutilation having followed the preceding representa- 



tion ; the remainder as appearing May 3. 



16. Final appearance of B, fig. 3. 



J 7. Sundered portion, exposing the yellow interior of the Gordius. 



18. Ova. 



19. Ova, a little enlarged. 



PLATE VII.* 



FIG. 1. Upper surface of another specimen in motion the anterior extremity. 



2. A broken off posterior extremity. 



3. The mouth. 



