PLATE XIII. 



Note. — Nachet's objectives i, 3 and 5, oculars i and 2, with camera lucida. 

 All drawings are reduced % in photo-engraving. The magnification figures 

 here printed are true for the drawings as printed. 



Figs, i, a-/. Cynodontium treleasei. 



I, a. Entire plant, natural size. 



I, ^. Leaf (X 34)- 



I, c. Apex of the leaf ( X I35)- 



I, d. Perichsetial leaf ( X 34)- 



I, e. Capsule ( X 13)- 



I,/. Lid (X 30). 



I, g. Basal areolation of the leaf ( X 135)- 



I, It. Marginal areolation in the middle ( X 270). 



1, /. Areolation in the upper part ( X -7o). 



2, a-b. DicJiodo7itium pellucidiim kodiakaniim. 



2, a. Leaves ( X I3)' * 



2, 5. Apex of the leaf ( X 60). 



3, (i-_f. D/cranufn subfiagellare. 

 3, a. Entire plant, natural size. 

 Z,b. Leaf (X 26). 



3, c. Apex of the same ( X i35)- 



3, d. Basal areolation ( X i35)' 



3, e. Areolation in the middle of a leaf ( X -7o)' 

 3,y^ Areolation in the upper part ( X270). 



4, a-e. Trichostomtim cuspi'datissitnum. 

 4, a. Entire plant, natural size. 



4, b, b. Leaves ( X35)- 



4, c. Basal areolation ( X i35)- 



4, d. Areolation in the middle of a leaf ( X 135) • 



4, e. Areolation of the upper part ( X I35)- 



(348) 



