. Bulletin of the British Museum (Natural History), Geology. 336 S. G. MOLYNEUX Remarks. The exact number of processes is uncertain owing to poor preservation, but one specimen has at least 40. Micrhystridium sp. D may be distinguished from Micrhystridium sp. B by its longer, more numerous processes, and from Micrhystridium sp. C by its shorter, more numerous processes. Micrhystridium sp. Figs 65, 72 Material. One specimen. Occurrence. Whitland Abbey Member: MPA 20098. Description. The specimen has a small, subspherical vesicle with convex sides. Eight processes are present. They are long, sle
. Bulletin of the British Museum (Natural History), Geology. 336 S. G. MOLYNEUX Remarks. The exact number of processes is uncertain owing to poor preservation, but one specimen has at least 40. Micrhystridium sp. D may be distinguished from Micrhystridium sp. B by its longer, more numerous processes, and from Micrhystridium sp. C by its shorter, more numerous processes. Micrhystridium sp. Figs 65, 72 Material. One specimen. Occurrence. Whitland Abbey Member: MPA 20098. Description. The specimen has a small, subspherical vesicle with convex sides. Eight processes are present. They are long, slender, possibly solid and evexate, tapering slightly from narrow bases that have an angular contact with the vesicle wall. The vesicle diameter is 14 x 12/mi and process length is approximately 7/mi. Genus NOTHOOIDIUM Loeblich & Tappan, 1976 Type species. Nothooidium mordidum (Cramer, Allam, Kanes & Diez 1974) Loeblich & Tappan 1976. Nothooidium! spp. Figs 75-76 Material. Two specimens. Occurrence. Afon Ffinnant Formation: MPA 20104. Pontyfenni Formation: MPA Figs 66-74 Micrhystridium spp., comparative illustrations of specimens recorded from the Arenig Series in south-west Wales. Bar represents 30nm. Fig. 66, Micrhystridium sp. A; MPK 4901. See Fig. 58. Fig. 67, Micrhystridium sp. B; MPK 4903. See Fig. 60. Fig. 68, Micrhystridium sp. C; MPK 4905. See Fig. 62. Fig. 69, Micrhystridium sp. D; MPK 4907. See Fig. 64. Fig. 70, Micrhystridium aff. acuminosum Cramer & Diez 1977; MPK 4888. See Fig. 45. Fig. 71, Micrhystridium aff. nannacanthum Deftandre 1945; MPK 4897. See Fig. 54. Fig. 72, Micrhystridium sp.; MPK 4908. See Fig. 65. Fig. 73, Micrhystri- dium aff. henrvi Paris & Deunff 1970; MPK 4895. See Fig. 52. Fig. 74, Micrhystridium cf. inconspicuum aremoricanum Paris & Deunff 1970; MPK 4893. See Fig. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appeara
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