PLATE VIII. 
Fic. 1.— Eprprermis of Lilium longiflora, magnified 50 diam- 
eters by Collins’s one-inch objective; not stained; no heliostat. 
Fic. 2.— Epiprrmis of Anagalis, San Francisco, 1882; magni- 
fied 50 diameters by Beck’s two-thirds-inch objective; not stained; 
no heliostat. 
Fie. 3. — Eprpermis of Echeveria, San Francisco, 1882; magni- 
fied 75 diameters by Beck’s two-thirds-inch objective; not stained ; 
no heliostat. 
Fig. 4.— Eprpermis of Agave Americana, San Francisco, 1882; 
magnified one hundred diameters; Collins’s one-inch objective; no 
heliostat. 
