PLATE VIII. 



. Wilsoni. Frond-filaments of same, showing very obtuse later. il appendages 83. </. I 

 ment of same b. Apices of same >\v 



Ditto. Filaments of stipes of same 83. </. Portion of same 375. 



Chlor odesmis. 



Chlorodesmis comosa Bail. and Harvey. Plant showing creeping nodulose base, from which spring 

 th< ling filaments. rhese are torulose for a short distance above their origin from the 



creeping base, and then become cylindrical and branch dichotomously. The lowest supra- 

 dichotomial constrictions are even [a), the upper ones are very uneven (/'). 8. (Saleh Bay, 

 Siboga Expedition). 



70. Ditto. Creeping basal filament from lig. 69, enlarged, showing toruloid constrictions. I rom it 



arise tluee torulose ascending filaments (as in fig. 69). The other branchlets are young stolons 

 and rhizoids. 4e). (Saleh Bay, Siboga Expedition). 



71. Ditto. Dichotomy with even constrictions, situated at «/ in fig. 69. 40. (Saleh Ba) . 



72. Ditto. Dichotomy with very uneven constrictions, situated at 6 in fig. 69. 40. (Saleh Bay). 

 Fig. 73. Ditto. (/. Portions of plant showing on right) basal stolons and (on left) upper filaments with 



ven constrictions (Friendly [slands, Harvey n". 90) ■ 8; b. dichotomy with uneven con- 

 strictions, 40; c. rhizoid, torulose base and lowest dichotomy of an ascending filament, 40. 



74. Chlorodesmis Hildebrandtii n. sp. a. ('reeping basal portion of hl. munt. showing stolons and 



rhizoids, 8 (Comoro, Hildebrandt n". 591 ; b. upper filaments 8; c. dichotomy with even 

 constrictions, \ I "tnoro). 



;;,/. c. Ditto. <i. Portion of plant (Saleyer, Siboga Expedition' showing stolons and ascending fila- 

 ments, S; c, dichotomy from upper portion of same plant, showing even constrictions. 40. 

 [Fig. 75/' is on plate IX. I 



. Xvrainvillea. 



I 76. Avrainvillea Rawsoni Howe. Habit of plant. nat. size. (Barbados, Rawsori). This species has no 

 flabelliform frond. 



