Journal and proceedings of the Royal Society of New South Wales . Fig. 24. Exterior of valve of Trigonia margaritacea. JOURNSL ROYAL SOCIETY, , 1888. Pi»tei4 p«tnj. Fig. 25. Oater surface of Trigonia lamarckii, seen obliquely, x 800 diam.

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Keywords: ., bookcentury1800, bookdecade1860, booksubjectscience, bookyear1867