154 
MR. H. N. MOSELEY ON THE ANATOMY AND 
Fig. 13. Small portion of a longitudinal section in the plane of the body of Bijpalium 
Diana in the dorsal region, to show the muscular arrangement. 
The appearance here represented is to be observed when a longitudinal 
section of Bipalium in the superficial dorsal region is viewed from above. 
A. Superficial external circular and decussating muscular layer. 
B. Stout longitudinal muscular bands seen beneath the external layer (A) 
by alteration of the focus of the microscope. 
C. Urticating cells seen in section. 
PLATE XI. 
Fig. 1. Vertical section, taken in a direction transverse to the long axis of the body, of 
the skin of Bijpalium Diana with the adjoining tissues, from the lateral margin 
of the animal in the region of the external generative opening. Drawn with 
the camera lucida from a specimen hardened in spirit. Highly magnified. 
Superiorly is seen the epidermis (E), the structure of which is not well shown 
in this preparation ; imbedded in it, however, are three of the peculiar rod-like 
bodies — Stabchen-Korperchen. Beneath the epidermis lies the external cir- 
cular muscular layer (E. C. M.), in this region (lateral) of the body not dis- 
playing that complex interlacement of fibres which is to be observed in it in 
the dorsal and inferior regions. A dark line separates this muscular layer from 
the epidermis, and indicates a narrow line deeply stained with carmine, which 
represents the basement membrane (B). Though this section is taken in the 
region of the external generative opening, an eye(O) is seen on the right-hand 
side. E. L. M. points to one of a row of longitudinal muscular bundles seen 
in section. Between the external circular muscular layer and the internal 
longitudinal muscles (I. L. M.) a layer of loose tissue intervenes, composed of 
fibres passing from the radiating muscles (It. M.) to the external circular 
muscular layer. In this loose tissue are imbedded the glandular masses (G), 
the branching pigment-bodies (P), and the parent glands of the rod-like 
bodies (RG). 
E. Epidermis. 
B. Basement membrane. 
E. C. M. External circular muscular layer. 
0. Eye. 
E. L. M. External longitudinal muscles. 
1. L. M. Internal longitudinal muscles. 
E. M. Radiating muscles. 
G. Glandular masses. 
P. Pigment-bodies. 
RG. Parent glands of the rod-like bodies. 
