JOURNAL OF MICROSCOPICAL SCIENCE. 
DESCRIPTION OF PLATE VI, 
Illustrating Mr. E. Ray Lankester’s paper on the Earthworm. 
Fig. 
1.—Diagrammatic view of the circulation in an ordinary segment (20th). 
2.—Ditto in a generative segment (10th—14th). 
3.—Lateral ditto in three ordinary segments; the letters refer to the 
same parts in all three. 
a. Dorsal vessel. 
6. Sub-intestinal vessel. 
c. Ventral vessel. 
d. Alimentary canal, 
e. Cutaneous or peripheral vessels. 
g. Generative organs. 
Z. Deep commissural vessels. 
vz. Subventral chain of ganglia. 
p- Extra-vessels parallel to the sub-intestinal vessel. 
s. Excretorial plexus. 
sa. Afferent trunk of ditto. 
se. Efferent P 
4.—Muscular fibre in blood-vessel. 
5.—Corpuscles of the colourless or perivisceral fluid. 
a. Form of Monocystis Lumbricorum. 
6. Spermatic particles. 
6.—Cephalic ganglion and subventral chain of ganglia of ZL. terrestris. 
7.—General structure of subventral chain. 
8.—Ultimate constituents of ganglia and branches. 
