Only two specimens of the length 7 and 9 cm., not deeply 

 calcified, branched in one plane. Root generally bulbous or little 

 elongated. Joint immediately above root short, thick, subcylindrical 

 and stalk-like ; other joints very irregular, discoid, oval, cuneate, 

 or transversely rounded, not ribbed, thick, sessile; margin thick, entire 

 or slightly crenulated. Largest joint about 18 mm. long, 29 mm. 

 broad, about i mm. thick (dried). Peripheral cells 23-37 f- across. 



Hab. : Ishigaki Isl. (Ryukyu, Kuroiwa) and Pratas Isl. (near 

 Taiwan, Kawakami). 



PI. CXLIX, fig. 1-8. Fig. 1 : frond of Halimeda macroloba 

 Decne. from Ishigaki Isl., \. Fig. 2 : partly optical transverse 

 section through apex of a joint, just below the end of the fused 

 filaments, shewing a portion of the central strand, ^p. Fig. 3 : 

 filaments of central strand in longitudinal view, shewing pits at 

 point of fusion ; a a, b l>, etc. indicate four filaments ; e, upper free 

 margin of joint, **. Fig. 4 : filaments of central strand in longi- 

 tudinal view, shewing earlier stage of fusion, ~. Fig. 5 : vertical 

 section through apex of joint cut perpendicular to the surface of 

 frond, to show fusion of filaments of the central strand, ^. Fig. 

 6-7 : longitudinal view of peripheral cells, ^-p. Fig. 8 : surface- 

 view of peripheral cells, ^-j . 



Halimeda macroloba Decne. 



6N r> tt 3 T A, C 3 ^ fa W- 



^ CXLIX H j|g, i-S H. 

 &? 7% 9 cm. / - & ffl r >v / S.^y?,fiL?tflR7&i-5 



*, & - m - M - # ^. <* m ^ m & w % - & * ? & *. m 



