152 THE PLANT WORLD. 



Dicotyledons 78,200 



Monocotyledons 19,600 



Gymnospernis 2,420 



Estimated subsequent additions 5,011 



Total Phanerogams. . 105,231 



Filiciniv (including Isoetes), about 3,000 



Lycopodinse, about 432 



Equisetinfe, about 20 



Total Pteridophyta 3,452 



Musci 4,609 



Hepaticae . 3, 041 



Total Bryophyta , 7,650 



Fungi (including Bacteria) 39,663 



Lichens 5,600 



Alg» (including 6000 Diatoms) 14,000 



Total Thallopbyta 59,263 



Addino; these totals together — 



Phanerogams .... 105,231 



Pterodophyta 3,452 



Bryophyta.. , 7,650 



Thallophyta 59,263 



We have a grand total of 175,596 



Professor Vines' prediction as to the prol)able number in the 

 world is as follows: "We may venture to cast a forward glance upon 

 the possible future development of the knowledge of species. Various 

 partial estimates have been made as to the prol)ablc number of existing 

 species of this or that group, but the only comprehensive estimate with 

 which I am acquainted is that of Professor Saccardo. He begins with 

 a somewhat startling calculation to the effect that there are at least 

 250,000 existing species of Fungi alone, and he goes on to suggest that 

 prol)ably the number of species belonging to the various other groups 

 would amount to 150,000; hence the total number of species now living 

 is to be estimated at over 400,000. On the basis of this estimate it 

 appears that we have not yet made the acquaintance of half the con- 

 temporary species; so that there remains plenty of occupation for 

 systematic and descriptive botanists, especially in the department of 

 Fungologv."— F. H. K. 



