= 
(ep) 
ISS 
LIVERPOOL BIOLOGICAL SOCIETY. 
S. 1. = Swift’s 1 in. obj., oc. 2, magnifying about 45 diam. 
S. i, — ” 4 ” 2”) 9 29 230 ” 
S. 0 = 99 ; ey) ” ) ” 330 ” 
Lie — 9 Aeiss;s -.\(Oll mmrers.) 50 C2 ae mes OD), 
Puate VI. 
Comparative views of the condition of the Epipodia as 
seen in transverse sections of various Opisthobranchiate 
Mollusca. 
Fig. 1. Sketch of Hlysca from the dorsal surface to show 
the epipodia (e.p.) x 2. 
Fig. 2. Sketch of Aplysia from the left side to show the 
epipodia (e.p.), nat. size. 
Fig. 8. Outline of transverse section of Aplysza, one-third 
along the body from the front, to show the 
relations of the epipodia (e.p.), mantle (m) and 
foot (f). Zeiss a*, 10. 
Fig. 4. T.S. (transverse section) of Acanthodoris pilosa, 
through the rhinophores (7/.) showing the epi- 
podial ridge and large papille. 8.1. reduced. 
Fig. 5. Another section of the same, about middle of 
body, showing the distinctly lateral arrange- 
ment of the papille. $8.1. reduced. 
Fig. 6. T.8. of Gontodoris nodosa, one-third along body 
from the front (ten sections behind rhinophores), 
to show the lateral epipodial ridges (e.p.). .1. 
Fig. 7. T.8. of Polycera quadrilineata (60th sect. from 
front) showing the lateral ridges at the sides of 
the rhinophores. 8.1. Compare with fig. 4. 
Fig. 8. Another of same (150th sect. from front, about 
middle of body) showing the prominent ridges 
(right side) and processes (left side) containing 
glands, placed at the sides of the branchie. §.1. 
4 
a 
F 
; 
4 
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