ÖPVERSIGT AF K. VETENSK.-AKAD. EÖIIHANDLINGAR 1900, N:0 t. 7 



The septa of the first and second eycle are of equal size 

 and in fact they continue straight to the centre of the calicle 

 though not in a coherent lamina. About halfways from the 

 theca they are broken up into a row of detached papillas (fig, 3), 

 which decrease in size towards the centre. At the highest they 

 are not raore than four at the inner edge of the septum. These 

 papillee have wartlets or excrescencies on their top, quite as the 

 dentated crest of the outer septal lamina. The papillae clearly 

 beloiig to the septal body proper, which has been sectioned right 

 through to its basis. Accordingly I cannot regard these papillae 

 as homologous with true pali or paluli. Such as seen for instance 



These figures are from specimen B and maguified f. 

 millim. above the basis, f. 7 Ditto, 2,3 millim. 

 millim. above the basis. 



Fig. 6. Horizontal section 4 

 bove the basis, f. 8 ditto 1 



in Coenocyathus and Brachycathus have a distinct shape of their 

 own and are placed general ly opposite the septa of the third or 

 fourth eycle. But the papill« of Thecocyathus are all alike and 

 those in the centre cannot be said to form any columella as they 

 radiate towards the surrounding septa of the first and second 

 eycle. 



