PLATE \ I. 



I lutinata. Filament of sti] ame plant, showing lateral appendages dichotomously 



divided and terminated by dactyline apice . 83. 

 ! .talis n. sp. Filaments of frond, showing uneven supra-dichotomial constrictions. (Landu 



Baj . Rotti, reef. Sil pedition). 83. 



and b. Ditto. Filaments of stipes from same plant, showing lateral appendages dichotomously 

 divided and terminated by short obtuse apices, 83. 

 i explanata 11. sp. Habit of plant, nat. size. (( elebes. Siboga Expeditii 



Ditto. I ilaments of frond, showing even constrictions, 83. 

 51. Ditto. Filaments of stipes showing lateral appendages; </ 83; b 420. 

 i 52 Udotea nuln-a n. sp. o. and b. Habit of plant, nat. size. (Kurrachee, Murray in Herb. Mus. Brit.). 

 I 53. Ditto. Portion of frond of same in surface view, showing distribution of papillae; these are 

 formed on the outer surface only of the superficial filaments of the frond. Three filaments are 

 raised and turned back to show the absence of papillae elsewhere, and at the same time 

 reveal the oblique crossing of the (ilaments which constitute the frond. On the right of the 

 figure is a loosened filament bare ol papillae here and there, where it lias been overlain by 

 other filaments. (Kurrachee, Murray). 83. 

 14. Udotea palmetta 1' caisne. Filaments of stipes showing lateral appendages; n 83; b 1 

 55 l'i/o/ra spinulosa Howe. Habit of plant, nat. size. (Bahamas, Howe n". 3272 pro parte). Copy of 

 photograph reproduced in Buil. Torrey Bot. Club vol. XXXVI. [909. pi. 4. fig. 2. 



■ra spinulosa f. palmettoidea n. f. Filaments of frond. showing even supra-dichotomial con- 

 strictions and secund lateral appendagi 83. (St. Thomas, " Challenger" Expedition, in Herb. 

 Kew.). ii. apices of a filament from upper part of frond; above anti below the dichotomy art 

 a üw incipient lateral appendages, b. filament from base of frond with a few stalked lateral 

 appendages; being an interior filament it is mostly destitute of appendages, c, d, <. portions 

 of one and the same external filament from base of frond. 



