132 Scientific Intelligence. 
kingdom, as Professor Agardh 1 terms “ss is cee rapid progress i 
wards completion. The first volume (362 pages) contains the Fucoidee 
complete. The two parts of the second volume (720 pages) include 
13 of the 16 orders, as they are called, of the Floridee, or 
Alge, or all except a of Agardh’s series Desmiospermee, subseries 
as only in 1824 that the sysiem Algarum of the 
older Agardh was published, which comprised characters of ail the 
Alge then known, both of salt and fresh water, in a single small 18mo 
volume, of 312 pages. A. G 
3. L. R. Tulasne, Monographia Podostemacearum. (Excerpt. € es 
and anomatous family of aquatic Dicotyledoneous plants, most 
of sual imitate the ose weeds, sac lerte and Mosses in their organs 
of vegetation. Our own single representatives in the United States, and 
from which the order sa iis name, was the earliest known to botanis!s, 
having been detected in Virginia by. Barrister, and by him sent to Plu- 
kenet; although many years elapsed before it was described in Mich 
aux’s Flora Boreali-Americana, under the name of Podostemon » 
phyllum. Meanwhile a related plant had been discovered in Guiana by 
Aublet, bis Mourera fluviatilis. Two other South American _ 
were found by Hu ocr : ~~ a number of Brazilian species 
ing to two or three new genera were discovered by Martius, St. Hilaire, 
and Riedel. Neaaeblia Petit-Thouars had made known three new 
genera of the order from Madagascar. In recent times the number of 
nown species has largely increased, chiefly through the researches of 
the late Dr. Gardner, in Brazil and in Ceylon, and of Mr, Weddell, 10 
the interior of South America. Bongard reduced the known age to 
three ; one of which, his Philocrena, proves to be the same 
Tristicha of Thouars. Endlicher admits six genera. Tulasne has now 
raised the number to twenty ; and has described about eighty species: 
They areall tropical, with three exceptions; namely Tristicha Dregean% 
and Spherothylax algiformis, of the Cape of — Hope, and our ie 
tributaries of the St. Lawre (At leas sl hae it from the - 
River, the mest eastern caan Sciregs into pies Ontario, on the nor 
ern side.) About two-thirds of the whole belong to South America, 
east of the crest of the Andes. Tulasne gives an account, first of the 
anatomy and organography of the plants of this acieageith full teil 
and then considers the question of their affinity. On this point (bey’ 
na indisputable fact that they are dicotyledoneous plants, not withstand- 
