. Annals of the South African Museum. Annale van die Suid-Afrikaanse Museum. Natural history. 14 Annals of the South African Museum. at the ambitus, and smaller on the dorsal surface and on the base of the test. Interambulacral plates high, each bearing a large primary, imper- forate, slightly crenulate tubercle with an areola of moderate size; these tubercles are largest at the ambitus, where they are surrounded by a narrow band of small tubercles and granules. Above the ambitus, and on the base of the test, the primary tubercles become smaller; above the ambitus the surrounding band of granu
. Annals of the South African Museum. Annale van die Suid-Afrikaanse Museum. Natural history. 14 Annals of the South African Museum. at the ambitus, and smaller on the dorsal surface and on the base of the test. Interambulacral plates high, each bearing a large primary, imper- forate, slightly crenulate tubercle with an areola of moderate size; these tubercles are largest at the ambitus, where they are surrounded by a narrow band of small tubercles and granules. Above the ambitus, and on the base of the test, the primary tubercles become smaller; above the ambitus the surrounding band of granules becomes much wider. At the ambitus and continued on to the base of the test there is a row of secondary tubercles at the external margin of the area. Peristome of moderate 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; South African Museum. Annale van die Suid-Afrikaanse Museum. Cape Town [etc. , South African Museum, etc. ]
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