THOREA. 65 



It might be supposed by some, from what has been said 

 in reference to the affinities of Thorea with the Batracho- 

 sperms, that it would naturally find a place amongst that 

 family, from which, however, it must be admitted, though 

 bearing certain resemblances to it, to be considerably es- 

 tranged by Its solid and inarticulate filaments. 



This genus was constituted by Bory, in honour of Dr. There, 

 " Naturaliste de Dax, autcur d'une Chloris du departemcnt 

 des Landes," by whom one of the species of the genus was 

 discovered. 



1. Thorea ramosissima. 



Plate XVI. Figs. 3, 4. 



Cha7\ Filaments very long and much branched. Colours, 

 when recent, blackish green, turning to violet in drying. 

 Bory, In Annales du Museum, voh xll. page 128. pi. 18. 

 fig. 1. Conf. hispida ramis vagis jiexuosis longissimis 

 obductis ramulis sctaceis, Drap. Ined. Conferva hispida 

 There, Mag. Encyc. t. vi. p. 398. Conferva hispida 

 There, Chloris, 442. Confervajlexuosajilamentis cylin- 

 draceis villosis subgclatinosis ; (3. aqua angustcR, JiJamentis 

 ramosis, violaceo subfuscis ; <y. pa7inensis, Jilamcnfis ramo- 

 sissiynis, violaceo griseis, Bory, 1. c. t. 11. p. 366. Batracho- 

 spermum hisjndum Cand. Syn. 12. ; Flor. Franc, ii. 

 p. 60. Th. Lchmanni Lyngb. t. 13.; Harvey in 

 Manual, page 120. 



" The Thorea ramosissiina grows in the Adour, where it 

 adlieres to stones, to rocks, to branches, and to the stems of 

 trees which are found upon its margins. It is only to be 

 obtained there when the Avaters are low, in June and July. 

 It Is again met with In the Seine, between Neuilly and Paris, 

 attached to difterent bodies, and particularly to the bottom of 

 boats. 



" From a little disc fixed upon the inundated bodies, proceed 

 certain filaments of the size of an ordinary thread, which 

 from their origin are ramified. The branches are always 

 F 



