of the wings, some in the middle of an articulus ; three coiiceptacles 

 have their roofs broken off, and piercing holes are seen as its result. 

 X Ca. 8. 



15. A diagramatic figure of the cross section of an articulus. x Ca. 7. 



Figs. l(i — 17. Cheilosporuiii latlssimum. 



16. Some of the fertile articuli ; each articulus bears four conceptacles in 



the figure, immersed in the external margins of the wings. X Ca. 3. 



17. Diagramatic figure of the cross section of an articulus. x Ca. 7. 



Compare 18, 1.5 and 17 ; and observe the proportions of the thickness 

 and breadth of the articuh'. 



Figs. 18 — 19. Cheilosporiim maximum. 



18. A portion of a fertile branch with normal conceptacles, magnified. 



ly. Cross section of an articulus bearing two conceptacles on its surface. 

 Their origins are deep in the medullary portion. 



Fig. 20. Corallina )iipponica. 

 A portion of a fertile branch, x Ca. 7. 



Figs. 21 — 24. GoralUna yenoshimensis. 



21. A portion of a fertile branch, x Ca. 7. 



22. Diagramatic figure of the meridional section of a branch through a 



conceptacle. Zeiss. 2 x AA. 



23. A portion of a longitudinal section of an articulus to show the cortical 



cells and the periclinal cells ; the latter have the large communicating 

 canals in the cellwalls. Zeiss. 4 x DD. 



24. A portion of a cross section of the same. Zeiss. 2 x DD. 



