PLATE 4 
EXPLANATION OF FIGURES 
29 Spermatophoric organ seen from the surface that is free from the vis- 
ceral mass. X 4 diameters. 
30 Spermatophorie organ seen from the surface that is applied to the vis- 
ceral mass. XX 4 diameters. 
31 Finishing gland end of a spermatophoric organ seen from the same posi- 
tion as that is figure 29, but showing cut ends of the parts exposed by cross- 
section. X 12 diameters. 
32 Semidiagrammatie view of a spermatophoric organ with the parts sepa- 
rated and the walls cut away to show the internal arrangements of the parts. 
The second division of the mucilaginous gland has had the wall cut away so as 
to expose the vas deferens as it approaches its entrance to this gland. The 
figure is made from the study of many dissections, and reconstructions from the 
study of sections of the organ. 
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