Hazen: NEW SPECIES OF LOBOMONAS 139 
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iS) 
Ny 
Explanation of plates 5 and 6 
Figures drawn with camera lucida from living material kept in hanging 
drops (VanTieghem cells of standard height of 5 mm.): Leitz compens. oc. 
I2 was used in combination with oil immers. obj. I-12 inch, or Spencer 2 mm. 
The drawings have been reduced one half in reproduction, making the present 
magnification approximately 1150 diameters for Fics. 1-21 and 41, and 1375 
diameters for F1Gs. 22-40. 
PLATE 5 
LoBOMONAS PENTAGONIA Hazen 
Fics. 1-5. Typical vegetative cells or zoospores: in Fics. 1-3 the 
deca lies on the under side of the ce 
G.5. Anterior 5 view: four unterige lobes emtpy, chromatophore 
filling fae posterior lo 
rotoplast yoreling clockwise in preparation for division; 7 P. M. 
e. 
si IG. 8. Division into two zoospores completed at 6:30 P. M. 
.9. Another individual: pyrenoid and cilia beginning to appear in 
‘ienhene cells; nucleus in most advanced lobe: 1 
Fic. 10. Pentagonal form attained by Uaiighter cells. 
Fic. 11. Four sich cells in one plane. 
Fic. 12. Two daughter cells with axes perpendicular to those of the 
other pair: 
