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J.D. TAYLOR AND E.A. GLOVER 



Fig. 22 Cardiolucina semperiana (Issel, 1 869), Sinai Coast, Gulf of Suez, Egypt. NMW 1 982.068. a, interior of right valve showing thick inner 

 demibranch of the ctenidium and cylindrical, vermiform foot; b, right valve showing pronounced visceral pouch and the foot with strongly corrugated 

 surface and small, rounded heel; c, section showing broad gill filaments and transverse muscle strands crossing the spaces within the filaments, 

 d, bacteriocyte zone with ovoid bacteria; e, labial palps (lp) and mouth (m); f, ctenidia attached to the posterior mantle by a thin muscular sheet. 

 Abbreviations: c=ctenidium, f=foot, v=visceral pouch, h=heel, lp=labial palps, m=mantle, a=attachment of ctenidium to mantle. Scale bars a = 1.0mm, b 

 = 500um, c = 40um, d = 5um, e = 150|im, f = 250um. 



