Gastropod gill morphology 
mula. A. General dorsal view of the gill. Bar = 0.15 mm. 
B. Part of filament with ciliated and non-ciliated cells. Bar = 4 um. C. Detail of a number of filaments. Bar = 
25 um. D. Paddle shaped cilia. Bar = 1 um. E. General view of gill in LM section. Bar = 0.2 mm. F. 
Longitudinal section of gill filaments. Bar = 95 um. Key: mv, microvilli; c, paddle shaped cilia; hs, haemocoelic 
space. 
