The Victorian naturalist . istinct possibility thatthey were one and the same was later confirmed by Tate andMay (1900). 226 The description of Z. tasmanica is asfollows: Shell cap-shaped, very flat,deHcate, elliptical in outline with adeep anterior fissure and a narrowfurrow extending from the fissure tothe apex. Apex minute, hooked, al-most reaching the posterior , pale brown. Sculpture of obli-quely radial and concentric threadletsproducing an elegant cancellation. Theaperture margin is finely serrated. Onthe inside which is smooth and glossy,is a narrow crescent-s

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The Victorian naturalist . istinct possibility thatthey were one and the same was later confirmed by Tate andMay (1900). 226 The description of Z. tasmanica is asfollows: Shell cap-shaped, very flat,deHcate, elliptical in outline with adeep anterior fissure and a narrowfurrow extending from the fissure tothe apex. Apex minute, hooked, al-most reaching the posterior , pale brown. Sculpture of obli-quely radial and concentric threadletsproducing an elegant cancellation. Theaperture margin is finely serrated. Onthe inside which is smooth and glossy,is a narrow crescent-shaped shelf atthe posterior end. Dimensions: mmX X height. Zeidora lodderae (Tate & May) wasoriginally incorrectly described andfigured as by Hedley, butTate and May later recognised it asa separate species. It is much smallerthan but otherwise verysimilar in appearance. The one strik-ing difference is that the apex of *Honorary Associate in Invertebrates,National Museum of Figure 1. Zeidora tasmanica. Vict. Nat. Vol. 93

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Keywords: ., bookcentury1800, bookdec, booksubjectnaturalhistory, bookyear1884