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JOURNAL OF MICROSCOPICAL SCIENCE. 
DESCRIPTION OF PLATE VI, 
Illustrating Mr. Archer’s paper on an Endeavour to identify 
Palmoglaa macrococca (Kiitz.) with Description of the 
Plant believed to be meant, and of a new Species, both, 
however, referable rather to the Genus Mesotzenium 
(Nag.). 
1.—Mesotenium chlamydosporum, cell in which the “ chlorophyll-plate” is 
not visible, by reason either of the remaining too dense contents 
concealing it, or of the edge view of the plate not being towards the 
observer. 
2.—Cell, showing edge view of chlorophyll-plate. 
3 and 4.—Accidental forms and positions of the chlorophyll-plate, edge 
view. 
5.—Cell about to divide; the chlorophyll-plate, seen in edge view, 
divided ; its inner end bluntly rounded. 
6.—Cell divided. 
7.—Two cells about to conjugate. 
8.—Two such cells in contact, the parent coats slipping off. 
9—13.—Various degrees of advancement in conjugation. 
14.—Zygospore formed, with definite mucous investment. 
15—19.—Various mature zygospores. 
20.—Mesotenium mirificum, cell showing edge view of chlorophyll-plate. 
21—25.—Cell-conteuts emerging. 
24 and 25.—Cell-contents emerged and balled together into a spore-like 
body of a reddish colour. 
26—31.— Various empty and discarded parent cell-membranes, showing the 
valve or lid-like portion, often detached. 
32.—Cosmarium exiguum (Arch.), front view of frond. 
33.— . Ms side view - 
34.—Penium Mooreanum (Arch.), frond, with endochrome. 
35.— a 3 dividing frond. 
36—38.— ,, a commencing conjugation. 
39.— 5 front view of zygospore. 
40.— is ‘3 side view of same. 
42 —44.—__,, > variously twisted zygospores. 
45 and 46.—Cosmarium pugmeun (Arch.), front view of frond. 
47.— 3 3 side view of same. 
48.— 2 end view of same. 
49.— a x zygospore. 
50. —Arthrodesmus tenuissimus (Arch.), front view of frond, 
a — Pr - side view i 
a a - end view * 
538and54— — 5, % dividing fronds, front view. 
Biase = Pe abnormal frond. 
