REPORT ON THE ECHINOIDEA. 291 



PhormoswiKt tenite, A. Ag. (figs. 5-9), p. 91. 

 Fig. 5. Abactinal system and segment of abactinal surface of young specimen, measuring 

 18 mm. in diameter (f). 

 ,, 6. Abactinal system and segment of abactinal surface of young specimen, measuring 



49 mm. in diameter. 

 „ 7. Actinal system and segment of actinal surface of same specimen as fig. 6. 

 „ 8. Coronal plates, near ambitus, of specimen measuring 90 mm. in diameter, from 



the abactinal surface. 

 ,, 9. Coronal plates of actinal surface near ambitus of same specimen as fig. 8. 



Micropyga tuherculata, A. Ag. (figs. 10, 11), p. G8. 

 „ 10. Young specimen, measuring 7 mm, in diameter, seen from the abactinal 



surface. 

 „ 11. Same, seen from the actinal side. 



Phorinosoina uranus, Wy. Thom., p. 103. 

 „ 12. Actinal system and segment of actinal surface of young specimen, measuring 

 8 mm. in diameter (f ). 



PLATE XIX. 



Asthenosoma pellucidum, A. Ag. (figs. 1-6), p. 85. 



Fig. 1 . Young specimen, seen from the actinal side ; natural size. 



2. Same specimen, seen from the abactinal side. 



3. Same, seen in profile. 



4. Somewhat larger specimen, seen from the actinal side. 



5. Same specimen, seen from the abactinal side. 



6. Same, seen in profile. 



Phormosoma tenue, A. Ag. (figs. 7-9), p. 91. 

 ,, 7. Young specimen, seen from the abactinal side. 

 „ 8. Same, seen from the actinal side. 

 „ 9. Same, seen in profile. 

 By mistake of the draughtsman the profile figures are all represented with the actinal 

 surface uppermost. 



All figures natural size. 



