126 PLANARIA. 
IX. Some Planariz multiply by spontaneous division of the body, 
a fragment becoming an entire animal after separation. 
X. Many species are endowed with a powerful reproductive faculty, 
whereby each of many parts into which a specimen may be mutilated 
becomes an entire animal. 
XI. Redundances of important organs to subsist at once is obtained 
by artificial laceration of a specimen. 
PiLate XIV. 
Fic. 1. Planaria cornuta, back. 
. The same, belly. 
wo bo 
. Under surface of a specimen, shewing the distribution of the vessels. 
enlarged. 
. Spawn, enlarged. 
. Planaria corniculata, back. 
. The same, belly. 
Spawn. 
. Ova, or capsules of same, enlarged. 
. Planaria ellipsis. 
Oo OTS oe 
10. Another specimen, enlarged, back. 
11. The same, belly. 
12. Another specimen, shewing the appearance of the vessels, enlarged. 
13. Surface of the head, shewing the distribution of the specks, enlarged. 
14. Internal vessels, magnified. 
15. Spawn. 
16. Portion of the same, enlarged. 
17. Pianaria flewilis, back. 
18. The same, belly. 
19. Surface of the anterior portion, shewing the position of the ocular 
specks, enlarged. 
20. Spawn. 
21. Spawn. 
22. Ova or capsules of the same, enlarged. 
23. Ova or capsules, enlarged. 
24. Nascent Planaria from the same ova or capsules, enlarged. 
25. Nascent Planaria from the capsule, shewing the position of the four 
clusters of ocular specks, enlarged. 
