Ser. RnoDOSPERMEiE. Fam. BhodomelacecB. 



Plate CLXXVIL 



KUETZINGTA ANGUSTA, Harv. 



Gen. Char. Frond flat, linear, piiinatifid, corticate, mitlribbed, and trans- 

 versely striate. Interior cells empty, uniseriate, tetraliedral,. arranged 

 in transverse rows ; cortical layer thick, of many rows of minute co- 

 loured cellules. Ceramidia unknown. Stichidia oblong, pedicellate, 

 rising from the transverse strise, containing tetraspores in a double 

 row. — KuETZiNGiA (Sond.), in honour of Prof. F. T. Klitzing, the 

 celebrated author of ' Phycologia Generalis/ and other well-known 

 works. 



Frons plana, linearis, pinnatifida, corticata, coslata, transversim striata. Cel- 

 lulce interiores hyaUnce, unlseriatce, tetrahedrce, transversim ordlnatce ; corti- 

 cales pluriseriatce, minima;, coloratce. Fruct. : 1, ceramidia (ignota) ; 2, 

 stichidia oblomja, pedicellata, e striis transversis enata tetrasporas dupUci 

 serie foventia. 



KuETZiNGiA angusta ; stipes long, naked below, subsiraple, ribbed and 

 two-edged; pinnse subdistant, erect, very narrow-Hnear, flat; pin- 

 nules opposite, with very slender midribs, with involute apices. 



K. angusta ; stipite elongato basi nudo suhsimplici costato ancipitique ; pinnis 

 distantibus alternis erectis angustissime linearibus planis paruvi compositis ; 

 pinnulis oppositis tenuissimis costulatis apicibus iuvolutis. 

 KuETZiNGiA angusta, Harv. in Trans. B. I. Acad. v. 22. p. 538 ; Alg. Austr. 

 Exsic. n. 131. 



Hab. Cast ashore at Eottnest Island in winter, rare, W. H. H. 



Geogb. Distr. "Western Australia. 



Descr. Root branching. Stem 6-8 inches long, scarcely a line broad, simple or 

 with one or few branches, flat, traversed by a thick midrib, generally bare 

 of pinnse, supporting a pinnately decompound frond which is 3-6 inches 

 long and 2-4 wide. Primary pinnce distant, and mostly alternate, 3-4 

 inches long, largely once or twice piunatifid, all the divisions erect, with 

 sharp axils. The segments are about a line wide, exactly linear, the older 

 ones costate, the younger traversed by a very slender, hair-like midvein ; 

 they are normally opposite, but by suppression frequently alteruate or se- 

 cund. The ajnces are blunt and miuutely inroiled. The lamina is every- 

 where closely transversely striate, and the structure is exactly that of K. 

 canaliculata. No fruit has been observed. The colour when recent is a 

 brownish purple or dull dark-red ; in drying this changes to dark brown or 

 blackish. The substance is coriaceo-membranous, and the /roH(/ does not 

 adhere to paper in drying. 



