28 



CALCAREOUS ALGAE OF THE MIDDLE EAST 



Fig. 3. Reconstruction (after Morellet 1918) of Clypeina. 

 (calcified) whorls above, terminal tuft at top. 



Sterile whorls below, fertile 

 X 30 approx. 



they had calcified evidence of the sterile portion of the plant, of the lower, atypical 

 fertile whorls, of the terminal structure, and of the serial association of the fertile 

 whorls. 



Pia (1927) placed Clypeina in the tribe Diploporeae, and he was followed in this 

 attribution by Emberger (1944) and Kamptner (1958). The Morellets (1913 : 31 ; 

 1918 : 102), students of Tertiary and Recent algae, grouped Clypeina under Acet- 

 abulariae with Halicoryne, Acetabularia and Acicularia, three genera still surviving, 

 and all showing separate sterile and fertile whorls and of somewhat similar mor- 

 phology. Rezak (1957) summarizing this, agreed with the Morellets in their attribu- 

 tion. Clypeina is now placed in a new tribe Clypeineae, for its geological appearance 



