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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![circular in shape. The front wall contains an elongate, depressed areola, the floor of which is cribriform, being perforated by from 4 to 8 pores. A line of punctures runs around the margin of the zocecia. Avicularia large, pointing obliquely upwards : situated close below7 the peristome. Goncecia sparsely scattered, low; aperture smaller than in the normal zocecia. Distribution.1 London Clay: Fareham (abundant); High gate; Haverstock Hill; Sydenham ; White Conduit House. Figures. PI. XXX. fig. 12. Part of a zoarium from the London Clay, Haverstock Hill, X 3 diam. Fig. 12 b. Several zooecia from the upper part of the same specimen. Fig. 12 c. Zooecia from lower in the same specimen. Fig. 13. Zocecia from base of another specimen.—PI. XXXI. fig. 1. Another specimen. Type. Brit. Mus. No. 49756, Edwards Coll.; Ilighgate. Wetherell’s figured speci- men is B. M. No. B 4443. Affinities. Wetherell found a minute fragment of this species in a well at Hampstead, and gave a good but small figure of it; this, however, seems to have escaped subsequent notice. Mr. Vine first described the species, and he regarded it as a variety of the w7ell- known recent species Adeonellopsis (Reptadeonella, Microporella, See.) violacea (Johnst.); from this, however, it differs very markedly in the nature of the avicularia, the cribriform area, the subtubular peristome, &c. The species to which it is most closely allied is Adeonellojpsis distoma (Busk); from this the main difference is in the avicularian orifice, which is much smaller in proportion to the size of the peristomial orifice, and it is placed below the latter and not included within the rim, which includes both the avicularium and orifice. In the London Clay species the avicularia are always directed very obliquely upwards. Busk has suggested that Reuss’s Eschara coscinoffinora is synonymous with A. distoma’, but agreeing with Mr. Waters [No. 6, p. 283, and No. 13, p. 162], who records the latter from the Italian Upper Eocenes, I prefer to keep them distinct. The London Clay species agree more with A. distoma than A. coscinophora. The specimens of the latter which agree most with our species are those from the Middle Oligocene of Sollingen in Prussia, figured by Reuss [No. 7, p. 186, pi. xi. figs. 1-4]: his figure 1 allows of a careful comparison of equivalent zooecia. The differences between the species are that in A. wetherelli the avicularia are oblique or transverse and much larger, the cribriform plate is larger and has more regular pores, and the secondary aperture is more raised. 1 There seems some confusion as to the localities and horizons of Mr. Vine’s types of this species and the next; the specimen figured as var. b (i. e. fig. 7 b) is recorded as from the Bracklesham Beds of the Isle of Wight; the slide is, however, correctly labelled from the London Clay.](https://iiif.wellcomecollection.org/image/b28141386_0094.jp2/full/800%2C/0/default.jpg)
