. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. 30 ANNALS OF THE SOUTH AFRICAN MUSEUM separated by a distance less than the height of a hydrotheca. Members of a pair of hydrothecae contiguous with one another on anterior surface in distal region of stem, but completely separate in proximal region. Hydrotheca tubular, adnate for over half adcauline length, smoothly bent out in distal half. Margin with two large, but delicate, lateral teeth and a short median adcauline tooth. Abcauline wall thickened just below margin. No internal teeth. Operculum o
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. 30 ANNALS OF THE SOUTH AFRICAN MUSEUM separated by a distance less than the height of a hydrotheca. Members of a pair of hydrothecae contiguous with one another on anterior surface in distal region of stem, but completely separate in proximal region. Hydrotheca tubular, adnate for over half adcauline length, smoothly bent out in distal half. Margin with two large, but delicate, lateral teeth and a short median adcauline tooth. Abcauline wall thickened just below margin. No internal teeth. Operculum of 2 valves: one large abcauline, and one small adcauline divided into 2 by a median Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original South African Museum. Cape Town : The Museum
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
