GILLS OF LAMELLIBRANCH 



3. Mytilus. Transverse section through filaments ; ciliated epithelium ; large epithelial cells and 

 ciliary junction ; chitinous rods ; vascular space of filaments. 



4. Anodon. Transverse section through gill. Filaments in section ; ciliated epithelium, chitinous 

 rods, vascular spaces in sub-filamentar tissue ; interlamellar junctions ; water pores leading into epi- 

 branchial space between gills. 



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