Contributions to the anatomy of anthropoid apes / by Frank E. Beddard.
- Frank Evers Beddard
- Date:
- 1893
Licence: Public Domain Mark
Credit: Contributions to the anatomy of anthropoid apes / by Frank E. Beddard. Source: Wellcome Collection.
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![granular. Zocecia separated by deep depressions. A line of areolae around the margin; these vary with the size of the zocecia from 10 to 15 or 18. Avicularia: usually one; lateral, placed close beside the orifice. Distribution. Bracklesham Beds, Bracklesham Bay. Type. Brit. Mus. No. 49734. Edwards Coll. (Encrusting.) Figure. PL XXXI. fig. 2. x 55 diam. Affinities. The shape of the orifice shows that this species is a true Lepralia, using that term, of course, in its modern restricted sense. It was figured by Lonsdale as Eschara brongniarti, a mistake due to his having failed to separate it from the Bryozoan on which it is encrusting. A comparison of his figure 9* with his figure 9 shows that he has included two different forms under one name. Among the species of Eepralia it most resembles Lepralia angiostoma, Reuss [No. 11, pp. 291, 292, pi. xxx. fig. 3], but it may be distinguished by the smallness of the orifice in the Austrian species. Genus Umbonula, Hincks. Diagnosis. Hincks, No. 2, pp. 316 and cxxxviii Species 1. Umbonula bartonense, n. sp. Diagnosis. Zoarium adnate, encrusting; forming a large and fairly thick crust over shells. Zocecia very crowded : quincuncially arranged; small, pyriform. Peristomial aperture semicircular or slightly clithridiate ; lower margin straight; very large, some- times occupying more than half the front of the zocecium. The front wall is occupied by a large umbo, formed on an avicularian cell, the opening of which is just below the aperture and is hidden by the prominence of the umbo. Around the margin of the zocecium runs a line of areolae ; those of the lower half are large, and from them furrows run some way up towards the umbo ; the areolae are small around the aperture. Avicularia and external marsupia none. Distribution. Barton Beds, Barton. Type. Brit. Mus. No. 49741. Figure. PI. XXXI. fig. 4. Portion of zoarium, X 55. diam. Gottardi’s Eschara prominens [No. i, pp. 306, 307, pi. xiv. fig. 4] probably belongs to this genus, but the species is so diagrammatically figured that I cannot be quite sure. The genus is a convenient one, though, as Mr. Waters has pointed out, it is a very close ally oi Lepralia, and perhaps ought not to be separated from it. The aperture in this species is typically lepralian.](https://iiif.wellcomecollection.org/image/b28141386_0096.jp2/full/800%2C/0/default.jpg)
