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.
86/246 page 238
![Munster, in Goldfuss, No. I, i. p. 102, pi. xxxvi. fig. 13], of which Reuss [No. 11, p. 291, pi. xxix. fig. 13] has given a good figure; from this it is distinguished by the form of the orifice, the absence of a ridge on the lower side of the aperture, and the much greater coarseness of the maculse. Waters [No. 12, p. 13] includes the Crosara species as a synonym of M. coriacea (Esper). The same characters separate it from M. munsteri (Reuss) [No. 6, p. 30, pi. x. fig. 2], which is very nearly allied to M. gracilis. As in the new species some of the zooecia and the opesiulae are replaced by large pores, while in others these are no larger than some of the maculae, it is evident that Mr. Hincks is fully justified in refusing to regard the presence of these opesiulae as an essential character of the genus. Genus Onychocella, Jullien, 1881. Diagnosis. Microporidae with large vicarious avicularia scattered over the zooecia [Jullien, No. i, p. 277]. Species 1. Onychocella magnoapeeta, n. sp. Diagnosis. Zoarium encrusting, forming a large compact crust. Zooecia usually hexagonal, occasionally becoming rounded at the edges and oval where they are less crowded. Apertures slightly clithridiate, very large, occupying nearly the whole front of the cell; the aperture is restricted by a small lamina at the lower side of the zooecium. The margins of the zooecia are raised, plain, and non- crenulate. Avicularia : large vicarious cells, long and tapering; irregularly scattered over the zoarium. Distribution. Brockenhurst Beds (Mid. Headon), Brockenhurst. Type. Brit. Mus. No. 49738. Edwards Coll. Figures. PI. NXX. fig. 7. Part of zoarium, X “ diam., including one of the large tapering vicarious avicularia. 4 Remarks. The subdivision of the great genus Membranijpora to which Jullien [No. i, p. 277] gave the name Onychocella appears to be based on more reliable characters than most of the genera which that author has proposed, and it seems to be now gener- ally accepted [see Waters, No. 12, pp. 8, 9]. The nature of the avicularian cells of this new species shows that it belongs to this group. Its nearest ally is 0. angu- losa (Reuss) [No. 1, p. 93, pi. xi. fig. 10], from which it differs in the much smaller size of the aperture in that species. If, as Waters suggests, Rhagasostoma hexagonum, Kosch. [No. 1. p. 30, pi. v. figs. 5-7], is only a synonym of 0. angulosa, it will be unnecessary to compare them further ; but if, as appears probable, it is a distinct species, the structure of the aperture will clearly distinguish it from the Brockenhurst form.](https://iiif.wellcomecollection.org/image/b28141386_0086.jp2/full/800%2C/0/default.jpg)
