fO Mr. WooDWARDi Ohfervations upon 



confufe the diftribution in SyJI. Veget. and in the works of other 

 authors. For this realbn, if is at prefent propofed to rejeft from 

 the £;enns Ulva fuch fpecies only as are cither known to be Fuci^ or 

 which, from their analogy with thofc, there are the ftrongeft 

 rcafons to conclude muft belong to that genus; and alfo fuch as 

 arc terreftrial and gelatinous, or which grow in frelli water, r nd 

 are gelatinous, and approaching to a globular form. This will 

 confine the genus Ulva to fuch plants as are really marine, with 

 the fingle exception of inteji'malis, which is found in both frefh and 

 fait watf r, and has fo great an affinity with latluca, Imza, and com- 

 prejfa, that it would be very improper to feparate them. For the 

 better diftinguifting, and the more eafy invefligation, of the nume- 

 rous fpecies, they are here arranged in different fubdivifions in the 

 following concife 



Synopsis Spegierum. 



Subd. I. Membranacese, fru6tif. adhuc incognita. 



A. fronde plana Integra. 



Ulva umbilicalis. Lim.—Gm. Syji. Nn/. — Hud.—Light. — JFith. 



purpurea. Gm. Sv/l. Nat. — Rotb. Fl. Gam. — an van praeced. ? 



plicata. Fl. Dan. t. 829. 



latiffima. Linn.—Gm. S\Jl. Nat.-— Light.— With. 



fufca. Hud. — a praecedente differt. 



lanceolata. Linn.—Gm. SyJl. Nat. — Hud. — fViih. 



laauca. Linn.—Gm. SyJl. Nat.— Hud.— Light.— With. 



B. fronde plana pertufa. 



Agarum. Gm. Hijl. Fucor. — Herb. Bankjianum. 



Clathrus. Gm. HiJl. Fucor. — Herb. Soc. Linn. 



reticulata. Gm. SyJi. Nat.—Foijh. Fl. ^gypt. Aral. 



C. fronde 



