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J.D. TAYLOR, Y.I. KANTOR AND A.V. SYSOEV 



Fig. 12 Mangelia powisiana; a, relaxed specimen showing sac-like structure at distal end of extended proboscis. Scale bar = 100 urn. b, 

 detail of sac body with warty external surface. Scale bar = 100 ^m. c, section of the sac showing the thin epithelium with granule structures 

 produced by single cells with large nuclei. Scale bar = 50 pirn, d, detail of c. Scale bar = 10 urn. 



