ECOLOGY AND TAXONOMY OF HaUmeda 



125 



Fig. 36. H. cuneata. A stalk region of uncorticated medullary filaments occurs between 

 some of the segiTients shown. SiDecinien from East Africa, Inhaea Island, 24 IV 56, 

 Isaac 799. (Photograph by Jodi Grenga.) 



Cortex of two to four layers of utricles; outermost utricles remaining 

 firmly attached after decalcification for an average distance of 35 (jim, 

 occasionally fusing laterally in pairs for this same distance ; unfused peripheral 

 utricles 25-63(-72) [im in diameter, (43-)58-100(-135) fxm long in section, 

 usually four but occasionally two supported by each secondary utricle; 

 secondary utricles 20-67(-79) [i,m broad, 20-67 yun long; tertiary utricles 

 (40-)50-80(-94) [xm broad. 



Nodal medullary filaments united in twos and threes, the length of fusion 

 usually 1-5 or several times the filament diameter; fused units densely 



