NOTICES OF BOOKS. 319 



described, viz. those from Texas and New Mexico, and also several 

 from near our northern boundary, and likely to occur within it" (p. 3). 

 The following notes at the same page just mentioned are worthy of 

 attention : — 



" The territory within the limits adopted, extending as it does from 

 25° to 47° north latitude, and traversed for nearly its entire length by 

 mountain ranges, reaching at several points in their northern and 

 southern terminations an alpine elevation, presents conditions favour- 

 able to a copious and varied muscological vegetation ; and if the num- 

 ber of species here recorded is not so large as that found in an equal 

 area similarly situated on the eastern continent, it must be borne in 

 mind that our Bryology and Hepaticology (particularly the latter) have 

 thus far been imperfectly investigated. Scarcely any portion of our 

 country, excepting Central Ohio, has been carefully examined. The 

 mountain ranges have only been cursorily visited by a few interested 

 in these branches of botany. In the northern section, notwithstanding 

 numerous discoveries made by the late Mr. Oakes, and the more recent 

 ones (among them a Dichelyma, a Tetrodontium, and an Atrichum) by 

 Thomas P. James, Esq., there will doubtless yet be detected many 

 other well-known European species, not a few of which have already 

 been collected in British America by Drummond. 



"The southern section has been even less carefully explored, and 

 offers a promising field for future discoveries. Among the recent ac- 

 cessions to our Flora from this quarter are an Orthotrichum, a Fissidens, 



W 



Macromitrinm 



;• M. Leo Les 



querreux. 



" No portion of our territory has contributed so little to our Bryology 

 and Hepaticology as the Florida peninsula, which in this respect still 

 remains almost a terra incognita, its only known species, Pylotrichum 

 cymhifolium, like Meteonum pendulum, from Western Louisiana (whence 

 novelties may also be expected), is thoroughly tropical in all its charac- 

 ters, and gives promise of new and interesting forms to reward future 



explorers.'' 



The volume opens with the characters of the Order Musci. Then 

 follows an Artificial Analysis of the Genera : the characters principally 

 derived from the nature, or presence or absence of the peristome, the 



