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Casis bandatum
The radula: Dr. Schilder (in litt.), did not find any distinct differences between the radula of C . esontropia and C .
cribraria.
Despite the lack of any appreciable differences in the live animal or radula of the two species, the shell possesses
sufficient morphological characteristics to be separated by collectors on sight. The profuse brown spotting of both margins
and thickening of both sides, are a constant feature in all adult shells of C. esontropia. The greater width in proportion to
the shell's length, deltoidal form, and smaller number of labial teeth, are features present in the greater part of shells,
though individuals may vary. C. cribraria lacks the thickening of the columellar margin and deltoidal form. the majority of
shells of any C. cribraria population are unspotted, although rare individuals may bear faint, sparse marginal spots on the
labial or both margins, the columellar spots, however, never extend onto the base. A specimen of C. cribraria from the
Philippine Islands, showed 10 weak, pale brown spots on the labial margin, and 13 on the columellar margin, in form the shell
was elongate-ovate, with the left side rounded, and the columellar teeth extended as strong ridges onto the fossula, thus
separating it from C. esontropia.
The parade of cowry-authors down through the years is an impressive one: Gaskoin, Gray, Jousseaume, Hidalgo, Menke, Brazier,
Hedley, Cox, Iredale, Cotton, and perhaps the greatest workers of them all, the Schilders, who have devoted their lives to
the research of every possible facet that could be considered as pertinent to the study of Cypraea.
I'd like to single out just two or three of the more important of the systematic works in this family that have played a
major role in the various revisions that have taken place. First of these is the work published in 1884 by Jousseaume in the
Bulletin of Zoology in France. Jousseaume established, in this paper, many of the generic groups still in use today --
defining their limits and grouping species roughly into these genera.
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