i 14 



and I character ii has in common with U, javensii 



■ n ;uished by its stouter frond-filaments and by its stipes, 

 which, n '. puts < »n t several descending branches or rhizoids (fig. \\ •-. these 



bran 'her into a compact column by means <>t" smal! lateral appenda 



ound the main filaments. The stipes of / m the other 



hand of .1 single uncorticated filament, which sometimes throws out a 



numl 



tative of this species in the Sib( llection was ed at 



li agrees with Harvey's authentic specimens in the characters of its 



frond-fil; tnd the fibulae at the base of the frond. It is a small plant, but an important 



and inst 1 in respect of its stipes. The stipes is very long and monosiphonous, thinly 



ending branches or rhizoids; and at its upper end it has begun to be 

 fibuliferous ... It is an indication of the process of developmenl of the compact stipes 



of the mature plant. Compare also the stipes of U. papillosa y p. 112). 



Harvey's Friendly fslands specimens are but thinly calcified, having therefore a i^reen 

 appearance, and their frond-filaments measure 65- 70 p in diameter. The specimens collected 

 at ["brres Straits by the "Challenger" Expedition are more calcified and have an ashy-grey 

 colour, with filaments of similar dimensions. Mr. Stanley Gardiner's specimens from Cargados 

 ijos were dredged up from a depth of 30 fathoms; thej are larger, with simple flabelliform 

 fronds, rotundate at base, monostromatic and not lamellate; the frond-filaments have a diameter 

 of 70 [i in young green specimens, varying up to 1057. in mature well-calcified filaments. 



I . glaucescens differs from Udotea orientalis, also an Eastern species, in having a 

 monostromatic frond composed of parallel, closely adherent, filaments; while the frond of U. 

 orientalis (fig. 1 l is pluriseriate and composed of filaments which are very much smaller, llexuose 

 and not closely paralli 



The distribution is confined to the Indian Ocean and tropical Pacific. 



4. Udotea conglutinata Lamouroux 



lli<t. Polyp. Corall. Flex. 1816. p. 312. 

 Syn. Corallina conglutinata Milis and Solander Nat. Ilist. Zoophytes. 1786. p. 125. tab. 25, fig. 7. 

 mglutinata Gmelin, Linn. Syst. Nat. vol. 1. part VI. 1790. p. 3843. 

 nglutinata \\>^c Hist. Nat. «les Vers (Suites a Huffon). vol. III [8 mo Paris (Déter- 

 ville). 1802. p. ~\. 

 Flabellaria conglutinata Lamarck Sur les Polyp. empatés in Ann. d. Mus. < 1 ' I list. Nat. XX. 



13. p. 301. 

 Flabellaria conglutinata Lamarck Anim. s.ms Vertèbn tom. II 1816, p. 343; also op. cit. 

 II tom. 2. 1836, p. 

 rallina conglutinata Cuvier Règne Anim. il. IV 1S17. p. jj. 



Jutinata l.i I Mi th. 1821. p. 28. tab. 25, fiv;. 7. 



.'n/in, i/a Deslongchamps in Encyclop. Méth. Zoophyt. 1S24 — 5. p. 

 'utinata Blainville in l>ict. Sci. Nat. LVI. iS.'S. ]>. 229. 

 lutinata Blainville Man. d'Actinolog. 1834. p. 55 

 ■-.'.' r ■lutinata Chauvin Recherches 1842. \>. 1 



'utinata Kützing Species Algarum 1849. p. 502. 



