Plate II. 



8 Spatangus purpureus. 19 Spat. Raschi. 12, 14, 16 Hybrid of Spat, purpureus and Raschi. i, 4. 18, 20 Hemiaster-expergitus, 

 3> 7> 9> X 3> r 5> T 7 Echinocardium pennatifidum. 5, 6, II ^A. capense. 2, 10 irA. flavcscens. 



Fig. i. Hemiaster expergitus, abactinal side. r /i- 



2. Echinocardium flavescens, abnormal specimen ; actinal side. 1 / I . 



- 3. pennatifidum, young specimen; side view. I / I . 



4. Hemiaster expergitus, actinal side. I / I . 



5. Echinocardium capense, actinal side. l / 1 . 



6. side view. 1 / I . 



7. pennatifidum, young specimen; abactinal side. 1 / I . 



8. Spatangus purpureus, abactinal side. I / I . 



9. Echinocardium pennatifidum, young specimen; actinal side. I I I . 

 10. flavescens, abnormal specimen; abactinal side. I / I . 



n. capense, abactinal side. I / I . 



12. Spatangus purpureus, hybrid; abactinal side. '/,. 



13. Echinocardium pennatifidum, side view. I / l . 



14. Spatangus purpureus, hybrid ; actinal side. 1 / I . 



15. Echinocardium pennatifidum, actinal side. '/,. 



16. Spatangus purp^lreus, hybrid ; side view, '/i- 



17. Echinocardium pennatifidum, abactinal side. I / 1 . 



18. Hemiaster expergitus, end view. 1 / 1 . 



19. Spatangus Raschi, side view. l j l . 



20. Hemiaster expergitus, side view. I / I . 



