. Bulletin of the British Museum (Natural History), Geology. FROM ENGLAND, SCOTLAND AND FRANCE 225 (Pectinatus Zone) 60 ft above Freshwater Steps Stone Band, Egmont Bight, Dorset. Dimensions: Overall length (apex lacking) 84\i, overall breadth gi-Sfx, length of cyst alone y2[j., breadth 8i-5fi., height of crests 5-9( Range of dimensions: Overall length (apex lacking) 45-98ti., overall breadth 42-9I-5JX. Observed range: Kimmeridgian (Baylei to Pallasioides). Remarks: This species, hitherto recorded only from the Baylei Zone, ranges throughout the Kimmeridgian (though it has not been encounte
. Bulletin of the British Museum (Natural History), Geology. FROM ENGLAND, SCOTLAND AND FRANCE 225 (Pectinatus Zone) 60 ft above Freshwater Steps Stone Band, Egmont Bight, Dorset. Dimensions: Overall length (apex lacking) 84\i, overall breadth gi-Sfx, length of cyst alone y2[j., breadth 8i-5fi., height of crests 5-9( Range of dimensions: Overall length (apex lacking) 45-98ti., overall breadth 42-9I-5JX. Observed range: Kimmeridgian (Baylei to Pallasioides). Remarks: This species, hitherto recorded only from the Baylei Zone, ranges throughout the Kimmeridgian (though it has not been encountered in some zones). The size range here quoted is significantly greater than that originally quoted (overall length 48-8o[jl, overall breadth 45-7810,): the specimen figured is one of the largest encountered. Meiourogonyaulax dicryptos sp. nov. Plate 7, figure 6; text-figure 22 Derivation of the name: Greek, di-, two, double; krypto, cover; referring to the two-layered shell wall. Diagnosis: Cyst subspherical to spherical, with the tabulation 4', 6", 6c, 7'", ip, I"", poorly marked by low ridges. Cingulum more or less equatorial and circular. Sulcus deep, short, confined to the hypotract, broadening towards the antapex. Cyst wall thick and composed of two layers: thick endophragm and thin periphragm. The periphragm bulges out on the apex to form a blunt apical horn, a cavity being developed between the two layers. Surface of the cyst is densely granular. Apical archaeopyle always present: sometimes the operculum remains attached to the shell, Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original British Museum (Natural History). London : BM(NH)
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