14 R.H.M. Eertman 
Plate 8. 
B. Detail of a number of filaments. Bar — 55 um. C. Detail of one filament. Bar 2 0.5 mm. D. General view of 
gill in LM section. Bar = 0.15 mm. E. Longitudinal section of gill filaments. Bar = 55 um. Key: dm, dorsal 
margin; mc, mucous cell; hs, haemocoelic space. 
