ON THE GENERA ANADYOMENE AND MICRODICTYON. 47 
Brazils. It is to be regretted that the specimens from these different 
localities have not been critically examined. 
r. Harvey’s character is excellent, viz. root fibrous; frond stipi- 
tate, membranaceous, leaf-like, flabellately veined ; the veins confluent, 
radiating from the base to the margins pedately multifid, excessively 
branched, and everywhere closely anastomosing; fructification unknown. 
* As Professor J. Agardh remarks (Alg. Medit. 24), it is related to 
Valonia, from which it differs chiefly in the lateral cohesion of the 
branches of the generating filament, and to which it bears the same 
relation that Codium does to Vaucheria. It is still more nearly related 
to Microdictyon, where the frond orms an open network.” Harvey 
l. c. 49 
Professor Harvey gives an interesting account of the — 
of the Florida specimens in his * Nereis Boreali-Americana,' vol. iii. 4 
l. A. stellata; frond coriaceous, the cells ovate, narrow at the 
base, with several diverging cells at the tip, some of which elongate, 
and are proliferous at their apex; the upper part of the sides of the 
sal cell, with some large cells placed at right angles with the prin- 
cipal cells; the frond between the main fibres formed of numerous 
variously-sized cells. — Lichenoides gelatinosum tenue reticulatum, 
Dillen. Muse. 138. t. 19. f. 21. Ulva stellata, Wulfen, Cr. Aquat. 6; 
Jacq. Collec. i. 321; Roth, Cat. Bot. ii. 243, 325. Anadyomene 
flabellata, Lamx. Pol. Flex. t. 11. f. 3; Bory, Nouv. Fl. Pélop. 78. 
t. 41. f. 5; Kützing, Sp. Alg. 611. 4. stellata, C. A. Agardh, Sp. 
Alg. i. 400; Syst. 191; Mart. Fl. Bras. i. 25 ; Montag. in La Sagra, 
Cuba, 22; Webb and Berth. Fl. Canar. iv. 180. 
Has. Mediterranean, m ulfen, spec. in Brit. Mus. Coast of France, 
Lamourous. 
Var. Floridana ; larger ; midrib more branched ; cells oblong, more 
ovate, not so narrow below.—A. flabellata, Harvey, Nereis Boreali- 
Americana, iii. 48. t. 44; excellent. 
Has. Florida: Key West, Herb. Harvey and Gray. 
I am by no means certain that the specimens from the coast of 
France, Florida, Cuba, and Brazil, combined in the above synonyma, 
are the same species, but I have not sufficient specimens at my com- 
mand to determine the question. 
I have only seen two small fragments of Wulfen's from the Mediter- 
ranean that were given to the Banksian collection by Dawson Turner, 
r 
