PLATE LXVI. 



PAGE 



Aidochone cylindnca, F. E. S., . . . 168 



Fio-. 1. Body and superior ^xixt of the pedicle, preserved in alcohol ; natural size. 



Fig. 2. Inferior view of the liody of the specimen shown in fig. 1 ; natural size. 



Fig. 3. Part of the inferior dermal side of the same specimen ; x 3. 



Fig. 4. Ideal longitudinal section of the same specimen ; natural size. 



Fig. 5. Part of a parenchymal diact ; x 200. 



Fig. 6. Oxyhexaster with strong principal rays, each bearing three diverging 

 terminal rays ; x 500. 



Fig. 7. Small discohexaster witli numerous terminal rays of various lengths ; 

 x500. 



Fig. 8. Portion of the skeleton of the stem ; x 100. 



Fig. 9. Outside view of the body ; x 60. 



Fig. 10. Autodermal pentact with rough rays ; x 200. 



Figs. 11, 12. Irregular forms of oxyhexaster ; x 500. 



This Plate was arranged by Sir WyA'ille Thomson. 



