PLATE V 



;s. i _\s on plate I lil 



\ & | S. Gepp. a. Ilal.it of plant, nat. size. (Maumeri, Sep. 1888, n°. 1037. 

 . Planl (Sankapura, Bawean Expedition), consisting ol 



nous stipcs and monostromatic frond, 22. c. Base ol frond [Sankapura) with 

 iphonous stipes and hyaline rootlets 30. 



1 n . sp. Habit -'t" plant Noimini Bay, Siboga Expedition). This consists ol a 

 fl a | frond arising by ramification from a short 1 erect parallel papillati 



which themselves arise by dichotomy from the api I the primary axis. Th» 



primary axis 1- concealed by the numerous rhizoids which spring from it. ■ .S. 

 Ditto. Portion of dichotomous filament from tion, showing whorls of obtuse 



or truncate papillae. (Sankapura, Bawean. Siboga Expedition). 178. 



/ papillosa subspec. subpapillata. Habit "f plant nat. size), showii nee <>f -tip 



East coast Timor, Si l >. •;_;.! Expedition . \Udotea subpapillata will probably prove to be a proper 

 spei 

 Ditto. Base of plant, showing primary filament surrounded by a loosi m of branching rhi- 



zoids which issue from it at different levels. The primary filament divides above into a 

 fascicle of a few erect branches, which constitute a very short compound stipes; this bears a 

 Aabelliform frond produced by the further ramification of the aforesaid branches in one plane. 

 Only the extreme base of the frond 1- shown in the drawing. In the portion here called 

 --talk" the rhizoids are seen to be reduced and soon replaced above by long papillae or 

 fibulae. 1'lnse fibulae occur also on the lowermost part of the frond, luit above are replaced 

 by inconspicuous papillae. 20. 

 • i. Ditto. Portion ol -hort branched filament from base ol frond viz. from upper part of preceding 

 re, fig. 83. It bears Ion. papillae, which correspond to the fibulae of U. oriënt alis 



and I '. conglutinata. 

 Ditto. Apical portion of a few frond-filaments from upper part of frond 83. The papillae, 

 never cons] are sometimes absent. 



. 4V UdoUa glaucescens Harvey. Base of a plant 20 Lirung, Sib< a 1 xpedition), showing the 

 developing condition of the stipes; the starting-point (st. p. probably was at about the place 

 indicated, where the uppermost rhizoids appeai to originate; these rhizoids spring from a 

 primary descending filament or rhizoid which may easily be traced [p. f.) to the lowest point 

 of the figure. Above the starting-point (st. p. a fascicle of filaments branching off from the 

 primary filament, ascends young ind stipes); and tin filaments, dividing at inter- 



val-. -"•!! spread out -o as to form the flabell >nd. rhe basal filaments below the frond 



bear fibulae (short lateral branchlets of the same diameter as their own), which later, increasing 

 atly in number and dividing dichotomously, become approximated .u\<\ combined into the 

 the pseudo-cortex of the mature stipes. A few of these original fibulae are shown at the top 

 of the figure. Thcy are also found upon the base of the frond and form a tomentum tl 

 The mature stipes, extending downwards, would gradually enco'mpass and envelope the upper 

 rh' lown in the figure. 



. ;. Udotea conglutinata Lamouroux. Habit of plant. nat. size. (Bahamas, Htrwe n". \i\o). 

 .--. Ditto. filaments of frond of same plant, shewing frequent dichotomies and even supradicho- 

 tomial constrictions, 



