170 



CRYPTOGAM I A. 



We should have taken this species (which we have also from Chili; 

 vide p. 165), to be Kiitzing's O. implicatus, had that author mentioned 

 the stipe, which forms one of the most striking features in our plant, 

 and which could not have been overlooked by so acute an observer as 

 Kiitzing. The fruit-bearing branches are not unlike those of Chon- 

 drus vermicularis, from which, in other respects, our plant widely 

 differs. It would be satisfactory to see specimens with tetraspores, 

 a knowledge of which is necessary, in order to fix the genus defi- 

 nitely. 



Gelidium intricate m, KiXtz. Pacific Islands. 



Gelidium radicans, Mont. Feejee Islands. 



Gelidium rigidum, var. unilaterale, Harv. & Bail. (Tab. 7.) 



Q. fronde lineari angusta compressa ramosa, ramis arcuatis plerumque 

 secundis paterdibus, ramulis secundis liorizontalibus obtusis ftliformi- 



blLSi 



Hab. Tahiti, Society Islands. 



Fronds 3 or 4 inches long, setaceous, compressed, vaguely branched ; 

 the principal divisions having a few distant, arching, secund branch- 

 lets, two inches long or more, naked below, above furnished with 

 several horizontally patent, filiform, secund branchlets, which are 

 either naked or bear a few other, tertiary ramuli. Color purplish, 

 changing to green. Substance very horny. 



A well-marked variety, which seems worth notice. Several speci- 

 mens were collected, agreeing with the above characters. 



Galaxaura lapidescens, Lamour. Feejee Islands. Tongatabu. 

 Galaxaura annulata, Lamour. Waikula, Sandwich Islands. 

 Galaxaura marginata, Lamour. Feejee Islands. 

 Liagora hirta, Harv. & Bail. 



L. subcalcarea, vage ramosa ; ramis aliernis vel oppositis elongatis attenur 

 atis simplicihus vel furcatis velutino-hirtis purpureis, ramulis latera- 

 libus paucis filiformibus. 



Hab. Navigators' Islands. 



