VARIATION IN ECHINOID PLUTEI 
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EXPLANATION OF FIGURES 
The figures are all drawn from camera lucida sketches and made from living 
Toxopneustes plutei. 
1. Ventral view. 24 hrs. 
2. Dorsal view. 48 hrs. 
3. Ventral view. 60 hrs. 
4. Side view. 72 hrs. 
5. Dorsal view. 5th day. 
6. Ventral view. 6th day. 
7. Dorsal view. 7th day. 
8. Abnormal pluteus. 8th day. 
9. Anal arms lacking. 3d day. 
10. One left anal arm. 3d day. 
11. Multiple left anal arm. 4th day. 
12. Multiple right and left anal arms. 4th day. 
13. Multiple oral and anal skeletal rods (one side only shown). 4th day. 
14. Multiple right anal skeletal rods. 5th day. 
15. Slightly cleft pre-oral region. 4th day. 
16. Median anal arm. 5th day. 
17. Cleft left anal arm. 4th day. 
18. No arms. 4th day. 
19. Auricularian type. 3d day. 
20. No arms. Rods passing around body. 6th day. 
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