148 Sir Everard Home on the double organs of 
Plate XVIII. The Earth Worm. 
Fig. 1. The same section as fig. 2, Plate XVII. magnified 
two diameters, showing the more internal parts for which 
purpose the spinal marrow is turned on one side : the intestine 
is laid open, exposing an hexangular tube, which has no com- 
munication with the intestine itself, but is posteriorly attached 
to that canal, and has two lateral openings into each compart- 
ment, showing the hexangular tube to be a reservoir of nutri- 
ment for the young. 
Fig. 2. A posterior view of the outside of a portion of the 
intestine ; magnified eight diameters. 
Upon this portion of intestine are seven partial contractions 
formed by the transverse decipimenta, between each of which 
are two orifices leading to the lateral membranous bags from 
the hexagonal tube. 
Between the two rows of openings is a longitudinal passage, 
forming a communication between the ovaria and the cells 
in the different compartments. 
Fig. 3. A transverse section of a portion of fig. 2, seen 
anteriorly. 
Fig. 4. A portion of intestine magnified as in fig. 2, laid 
open anteriorly to show the hexangular tube. 
Fig. 5. The external appearance of the mouth and head ; 
magnified six diameters. 
Fig. 6 . Shows the external appearance of the parts con- 
nected together in the time of copulation ; magnified six 
times. 
In the second ring from the top are two hemispherical 
protuberances with transverse slits. 
