1898-99. | ON THE CYTOLOGY OF NON-NUCLEATED ORGANISMS, 505 
EXPLANATION OF PLATE. 
All the Figures were outlined from the objects with an Abbe camera lucida and as 
viewed witha 3mm., 2mm,, or 1.5mm. apochromatic oil immersion objective, and an 8, 
12 or 18 compensation ocular (Zeiss). 
Fic. 1.—Cylindrospermnm majus. Fresh, 48 hour's culture in the laboratory. x 2,000. 
Fic. 2.—Osctllavia Froehlichiz. A cell viewed from the flat surface. Picric acid, picro- 
carmine, haematoxylin. 3,000. The transition from the central body to 
the peripheral zone, as represented in the figure is, unfortunately, rendered 
too abrupt. 
Fic, 3.—Osctllaria Froehlichit. View of two cells from the side, optical section. Picric 
acid, picrocarmine, hzematoxylin. x 3,000. 
Fic. 4.—Tolypothrix sp. Corrosive sublimate, haematoxylin. x 1,500. 
FIG. 5.—TZolypothrix sp. Digestion with artificial gastric juice three days, extracted 
with alcohol and ether, Ehrlich’s haematoxylin (dilute) 24 hours. x 1,500. 
Fic. 6.—-Z7olypothrix sp. Strong Flemming’s fluid 24 hours, Delafield’s haematoxylin. 
x 1,500. 
Fic. 7.— Tolypothrix sp. Corrosive sublimate, Delafield’s hematoxylin. 1,500. 
Fic. 8.—Oscillarta natans. Digested with artificial gastric juice 6 days, alcohol 1 day, 
alcohol and ether 8 hours, hematoxylin. 1,500. 
Fic. 9.—Oscillaria Froehlichit. Digested with artificial gastric juice 6 weeks, alcohol 
and ether, KHO 0.3 per cent. 24 hours, picrocarmine. x 1,360. 
Fic. 10.—Mrcrocoleus terrestris. Digested with artificial gastric juice 3 days, hama- 
toxylin, glycerine. 1,500. The dye has given a greenish-blue tinge to 
the cytoplasm in the central part. 
Fic. 11 a and b.——J&icrocoleus terrestris. Alcohol, a, hydrogen proxide 3 hours, acid 
ferrocyanide solution, balsam ; 4, haematoxylin, glycerine. x 1,500. 
Fics. 12 and 13.— Zolypothrix sp. Alcohol, hydrogen peroxide 3 hours, acid ferro- 
cyanide solution, glycerine. x 3,000. 
Fic. 14.—Osctllaria Froehlichii '(?). Alcohol, hydrogen peroxide 3 hours, acid ferro- 
cyanide solution, picrocarmine, balsam. x 3,000. 
Fic. 15.—Lyngbta sp. Picric acid, picrocarmine. 1,000, 
Fic. 16.—Osczllaria tenerrima. Picric acid, picrocarmine, haematoxylin. x 3,000. 
FIG. 17.—Tolypothrix sp. Picric acid, hematoxylin, balsam. x 1,334. 
Fic. 18 a and 6.—Cylindrospermum majus. Old culture, acetic-methyl green. — x 3,000. 
Fic. 19.—Osczllaria natans. Fresh culture, artificial gastric juice 48 hours, picrocarmine, 
glycerine. x 2,250. 
FiG. 20.—Tolyfothrix sp. Alcohol, nitric-molybdate 10 hours. Phenylhydrazin hydro- 
chloride, balsam. x 1,334. 
