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.
81/246 page 233
![Distribution. London Clay, Highgate. Type. Brit. Mus. No. 69205. Wetherell Coll. Encrusting Ilippochrenes ampla. Figures. PL XXIX. figs. 9 a, b. Fig. 9 a, part of zoarium, magnified 4 diam., showing radial growths; fig. 9 b, X 12 diam. Affinities. The mode of growth in loose disconnected rows resembles that often assumed by M. catenularia (Jameson) [No. i, p. 561, name only] (Pyripora of Mac- gillivray) [No. i, pt. xi. p. 24], but the much greater size of the opesia in this species is quite distinctive. Genus Lunulites, Lamarck, 1816. [Lamarck, No. i, ii. p. 194.] Diagnosis. A genus of Membraniporidae with a unilaminate, conical, or cup-shaped zoarium. The zocecia are arranged in radial rows; radial rows of vibracularia either separate the zocecia or occur alternately. Type species. L. radiata, Lamk. [No. i, p. 195]. Species 1. Lunulites transiens L n. sp. Syn. Lunulites urceolata, Lonsdale, 1850, in Dixon’s Geol. Suss. pp. 159, 160, pi. i. fig. 8; 1878, do. ed. 2, pp. 201, 202, pi. i. fig. 8. Lunulites ? radiata, Lonsdale, 1850, in Dixon’s Geol. Suss. ed. 1, pi. i. fig. 8; 1878, do. ed. 2. Diagnosis. Zoarium of medium size, depressed, circular, thin, cup-shaped ; convex margin curved. Zocecia. Opesia with the aperture large, orbicular, elongate ; a small lamina at the lower end. The lateral margins are steep ; the inner margin slopes more gently. A pair of small tubercles occur on some of the margins between the two zocecia. Vibracularia large, aperture clithridiate; the radial series are connected by a groove; they increase in size towards the periphery, and gradually pass into normal zocecia (whence the specific name). On the concave side the ridges are irregularly distributed and are separated by deep grooves; there are numerous large pores ; on the narrower parts of the ridges there may be only a single line of pores. Dimensions. Diameter -5 mm.; height 1-25 mm. Taken from a small complete specimen. In some fragments the number of zocecia is from 18-20; number of zooecia in a radial series 10. Distribution. Upper Eocene, Barton Beds, Barton. Middle Eocene, Bracklesham Beds, Bracklesham, Bramshaw, Brook, Whitecliff Bay. Type. Brit. Mus. No. 49724. From Barton. Edwards Coll„ Figures. PL XXIX. fig. 13. Part of zoarium showing back, x 24 diam. Fig. 14. Several normal zooecia, X 24 diam.—Pl. XXX. fig. 1. Another specimen, showing the Referring to the gradual passage from vibracularia to zocecia.](https://iiif.wellcomecollection.org/image/b28141386_0081.jp2/full/800%2C/0/default.jpg)
