. Bulletin of the British Museum (Natural History), Geology. ACRITARCHS AND CHITINOZOA 357 135. 38b 139a Figs 135-137, 139 Belonechitina spp.; Pontyfenni Formation; x 480 (Fig. 139B x 1200). Fig. 135, MPK 4966, sample MPA 20092; slide 2, L21/0. Fig. 136, MPK 4967, sample MPA 20091; slide 1, K22/4. Fig. 137A, B, high and low focus, MPK 4968, sample MPA 20091; slide 2, H25/3. Fig. 139A, B (B detail of surface ornament x 1200), MPK 4970, sample MPA 20092; slide 2, J22/1. Fig. 138A, B Lagenochitina cylindrical Eisenack 1931, high and low focus; MPK 4969, sample MPA 20091, Pontyfenni Formation; sli
. Bulletin of the British Museum (Natural History), Geology. ACRITARCHS AND CHITINOZOA 357 135. 38b 139a Figs 135-137, 139 Belonechitina spp.; Pontyfenni Formation; x 480 (Fig. 139B x 1200). Fig. 135, MPK 4966, sample MPA 20092; slide 2, L21/0. Fig. 136, MPK 4967, sample MPA 20091; slide 1, K22/4. Fig. 137A, B, high and low focus, MPK 4968, sample MPA 20091; slide 2, H25/3. Fig. 139A, B (B detail of surface ornament x 1200), MPK 4970, sample MPA 20092; slide 2, J22/1. Fig. 138A, B Lagenochitina cylindrical Eisenack 1931, high and low focus; MPK 4969, sample MPA 20091, Pontyfenni Formation; slide 1, U25/3, x 480. Fig. 140 Conochitina cf. chydaea Jenkins 1967; MPK 4971, sample MPA 20092, Pontyfenni Formation; slide 1, PI9/0, x 1200. Genus CONOCHITINA Eisenack, 1931 Type species. Conochitina claviformis Eisenack 1931. Conochitina cf. chydaea Jenkins 1967 Fig. 140 cf. 1967 Conochitina chydaea Jenkins: 453-454; pi. 70, figs 4-8. Material. Six specimens. Occurrence. Pontyfenni Formation: MPA 20091. Description. The vesicle is cylindro-conical, the base flat or slightly convex and the basal edge rounded. Flexures and shoulders are not developed. The neck is poorly developed and may flare aborally of the 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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