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PACIFIC SCIENCE, Vol. VII, July, 1953 
Fig. 10. Reconstruction of the vas deferens through region g (Fig. 5). a, Ampulla of sperm forming as arch; 
b, pear-shaped sperm column; c, connecting sperm-column sheath. (55 X.) 
contractions of the muscular wall, undulates 
into continuous sinusoidal curves. 
Because of the compact coils of the left- 
handed helix (Fig. 5g), sections parallel to 
the longitudinal axis of the lumen and at the 
same time through the plane c-d (Fig. 8) are 
difficult to obtain. Sufficient portions are avail- 
able, however, to permit a fairly accurate re- 
construction (Fig. 10). Although the sperm 
column appears to be segmented into sep- 
arate and distinct arches, when viewed through 
the wall of the vas deferens (Fig 5g), these 
arches are in reality joined one to the other. 
This obvious discrepancy is easily explained. 
Throughout the compact, left-handed coils 
of this region (Fig. 5g) the wider portion of 
the pear-shaped lumen occupies a position 
nearer the outer edges of the coils, whereas 
Fig. 11 . Reconstruction of the contents of the vas deferens through regions g, h (Fig. 5). a. Continuous thread 
of stalk material; b, c, d, e, stalk-forming material accumulating between the closing arches. (55 X.) 
