Ser. lliiODOSPEiiMEiE. Tarn. Ilelminthodadea. 



Plate CLXII. 



LIAGORA CHEYNEANA, Haw. 



Gen. Char. Frond terete or compressed, dicliotomous or pinnate, at length 

 coated with a calcareous deposit, with a filamentous axis and continu- 

 ous stratum of peripheric filaments ; axis formed of long, branching, 

 interlaced, longitudinal filaments ; peripherij of horizontal, articulated, 

 moniliform, branching filaments. Fructification imperfectly known. 

 — LiAGOiiA [Lamoiir.], a classical name ; one of the Nereids. 



Frons teretlnscula v. cojripressa, dichotovia v. pinnatlm ramidosa, criista cal- 

 carea clenuim obducta, axi stratoque peripherico continuo conslitnta ; axis fills 

 elongatis ramosis artlculatls intricatls constans ; stratum periphericum fills 

 horizontallbus artlculatls monlliformibus ramosis constltutum. Fructus vlx 

 uotus. 



LiAGOUA Clieyneana; frond gelatinous, compressed, somewhat channelled 

 when dry, dichotomous, much-branched; branches erecto-patent, sil- 

 very, clothed with a purple tomentum; apices diverging; peripheric 

 filaments free, cylindrical, forked. 



L. Cheyneana ; fronde gelatlnosa compressa slccllate subcanallculata dlchofoma 

 ramoslsslma; ramls crecto-jjatentlbus argentels vlllo purpurea tomentosls; apl- 

 clbus divarlcatls, fills per Ipher Ids llberls cylindracels furcatls. 



LiAGORA Cheyneana, Harv. in Trans. R. I. Acad. v. 22. p. 553. Harv. Alg. 

 Austr. Exsic. n. 352. 



Hab. On rocks and the smaller Algse, within tide-marks. At Cape Riche, 



IF. H. H. Fremantle, G. Clifton. 

 Geogr. Distr. Western and soutb-westeru coasts. 



Descr. Fronds tufted, 3-6 inches long, ^-1 Hne in diameter, subcorapressed, 

 of nearly equal diameter throughout, when dry collapsing and partly chan- 

 nelled, irregularly much branched, subdicholomous, rarely having any lateral 

 branchlets. lu full-grown fronds there is a more or less evident leading 

 stem, throwing out subquadrifarious sparingly dichotomous branches ; some- 

 times the whole frond is pretty regularly dichotomous. The branches are 

 flexuous, forked at intervals of one or two inches, the axils rounded, and the 

 apices divergent. When growing, the whole frond is of a beautiful rosy 

 purple; the colour residing in the soft, subgelatinous, peripheric filaments, 

 which project, as a villum, beyond the calcareous substratum of the frond. 

 When dry, the surface is pow'dery and mottled, white and purplish, the sil- 

 very substratum appearing through the shrunk peripheric filaments. The 

 peripheric filaments are subcylindrical, with joints tuo to three times longer 

 than broad. Sometimes they bear at their extremities globose tufts of di- 

 chotomously much-branched, fastigiate, minute, moniliform filaments, which 



