Pscudo-Reduction in tlie Oögenesis of Allolobophora foetida. 
163 
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Explanation of Plates. 
All the photographs were taken at a magnification of one thousand diameters 
from our smear preparatious stained with a saturate solution of Bismarck brown. 
In no case have the negatives or prints been retouched in any way. We wish 
to emphasize this in the case of photo 19 where the form of the chromosomes appears 
almost diagrammatic. 
Plate XI. 
Photo 1. An oögonial prophase group showing 22 chromosomes. 
Photo 2. A group of pseudo-reduced chromosomes — “bouquet stage”. Eleven 
cliromosomes can be clearly counted. These stages are found at the proximal end 
of the ovary — see text-ügure. 
Photo 3. The same stage as photo 2. The bouquet form of the group has been 
disturbed probably by the technique. Eleven bivalents can be clearly counted. 
11 * 
