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MR. H. N. MOSELEY ON THE ANATOMY AND 
E. L. M. External longitudinal muscles.^ 
L. M. External longitudinal muscles of the ambulacral line. 
R. M. Radiating muscles. 
V. M. V ertical muscles of the ambulacral line. 
I. L. M. Internal longitudinal muscles. 
Fig. 4. Portion of the epidermis of Bipalium Diana in vertical section. From a section 
of a specimen hardened in spirit, treated with caustic-potash solution. 
The epidermic structures in a state of contraction from the action of the 
spirit have been swollen out again by the potash. The rod-like bodies (R, R) 
are here of an elongated oval form ; each is enclosed with a capsule. They 
vary in size, and are placed at different altitudes in the epidermis. The large 
irregularly oval cells (G., G. C.), filled with granular contents, are glandular 
elements of the epidermis. The remainder of the epidermis is made up of 
stout fibres, probably remnants of empty capsules of rod-like bodies. Beneath 
the epidermis and external circular muscular coat (E. C. M.) is seen a gland- 
capsule (RG) with a rod-like body contained in it. The capsule sends a 
process up to the epidermis. 
Fig. 5. Schematic representation of the arrangement of the fibres of the external cir- 
cular and decussating muscular layer of Bipalium Diana in vertical section, 
as seen in its extreme development in the dorsal region. 
A. Decussating fibres. 
B. Circular fibres. 
C. Longitudinal muscular bands in section. 
Fig. 6. Diagrammatic representation of the generative organs of Bipalium Diana, as seen 
when laid open by longitudinal section. The external generative orifice (EX.) 
leads into a ciliated cavity: into this cavity opens superiorly the common 
internal generative aperture (CG.) , A straight ciliated tube, the vagina, passes 
vertically from this aperture, and turning sharply at right angles terminates 
at the entrance of the oviducts (OD.). The horizontal portion may be con- 
sidered to be the uterus. Into the lower extremity of the vagina posteriorly 
opens the cavity containing the penis (C. P.), at an angle of about 45°. The 
dark lines radiating from the muscular body containing the uterus and vagina 
are accessory glands. 
EX. External generative orifice. 
CG. Common internal orifice. 
Y. Vagina. 
UT. Uterus. 
OD. Oviduct. 
C. M. Circular muscular coat. 
* L. M. Longitudinal muscular coat. 
C. P. Cavity containing penis. 
