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.
106/246 page 258
![Figures. PI. XXXII. figs. 2 a, 2 b. Zoarium and section. Affinities. This species belongs to the first of the groups of Idmonea, including those with the zooecia all in lateral series. It most closely resembles a specimen figured by Manzoni [No. 4, p. 5, pi. iii. fig. 10] as 1. carinatal, Rom. A comparison with the figures both of Homer [No. 1, p. 21, pi. v. fig. 20] and Heuss [No. i, pp. 44, 45, pi. vi. fig. 27] would seem to show that the query after the identification was very well founded ; in the number of zooecia, the shape and structure of cross-sections, and other points, Manzoni’s figures markedly differ from those of the larger pluriserial triangular species figured by Homer from the North-German Chalk. From the typical I. carinata the London Clay species can be very readily distinguished. Idmonea reticulata, Reuss [No. n, pp. 281, 282, pi. xxxiv. fig. 13], belongs to the same series, but differs in the smaller size and more regular arrangement of the zooecia and apertures, which are grouped in triplets instead of pairs. The same characters also separate the new species from the I. laticosta, Mars. [No. 1, p. 29, pi. ii. fig. 11], of Danian age, which belongs to the same group. Species 3. Idmonea seriatopora, Heuss ('?). Syn. Idmonea seriatopora, Reuss, 1847, Foss. Polyp. Wiener Tertiarbeckens, p. 46, pi. vi. fig. 32; Manzoni, 1878, Brioz. foss. Mioc. Austr. Ungh., Denk. k. Ak. Wiss. Wien, Bd. xxxviii. Abth. 2, p. 6, pi. vi. fig. 12. Diagnosis. Zoarium of thick irregular branches, composed of many zooecia, well rounded at the back. Zooecia very irregularly arranged, the lateral ones the longest. There are no regular series arranged on either side of a medial line. Three zooecia often open in an oblique line. Peristome elliptic ; border irregular. Distribution. London Clay, Haverstock Hill.—Foreign. Leithakalk (Helvetian), Austria. Type. Brit. Mus. No. B4510. Figures. PI. XXXII. fig. 4 a. Part of a zoarium, X 18 diam. Fig. 4 b. Mouth, X 32 diam. Fig. 4 c. Transverse section, X 18 diam. Fig. 5. Back view of zoarium. This species belongs to the subgenus Tervia of Jullien. Affinities. The irregular distribution of the zooecia of this species reminds one of 1. compressa, Heuss [No. 1, p. 46, pi. vi. fig. 22], but the zoarium is not so laterally compressed. Its closest ally is Idmonea seriatopora, Heuss, as figured by Manzoni [No. 4, pp. 6, 7, pi. ii. fig. 8, pi. v. fig. 17]; to the original and no doubt diagrammatic figure of Heuss it has a less decided resemblance. But the London Clay specimen is not sufficiently large to allow of a more definite comparison; hence I do not feel able positively to affirm the occurrence of the Austrian Miocene species in the](https://iiif.wellcomecollection.org/image/b28141386_0106.jp2/full/800%2C/0/default.jpg)
