8 
R.H.M. Eertman 
TEM micrographs of the gill of Austrocochlea constricta. A. Part of gill filament showing single layered 
epithelium. Bar = 10 um. B. Ciliated and non-ciliated cells. Bar = 1 um. C. Nodule. Bar = 7 um. D. Mucous 
cell. Bar = 1.1 pm. E. Secretory cell. Bar = 1.2 рт. F. Detail of secretory cell. Bar = 0.4 um. Key: b, basal 
bodies; c, cilia; G, Golgi apparatus; m, mitochondria; mc, mucous cell; mv, microvilli; n, nucleus; rer, rough 
endoplasmatic reticulum; sv, secretory vesicle. 
