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Structure of the spore wall in certain miospores belonging to the series Cingulati Pot. and Klaus 1954

Miospores of the genera Densosporites and Anulatisporites are described in which the spore wall consists of two separate membranes. The inner membrane, considered to be the intexine, forms a 'central body' which can be seen in equatorial section of the spore exines in polished surfaces of coal and in specimens isolated from the coal.

Upper Silurian Bryozoa from Central Wales

A thin band of limestone in the Gypidula beds of the Lower Ludlow succession of Builth was described by S. H. Straw (1937) as being made up of shells and nodular Bryozoa. The Bryozoa are described and shown to belong to eight species, seven new and one described by R. S. Bassler (1906) from the Rochester Shale. They are Fistulipora umbrosa sp. nov., F. strawi sp. nov., Dekayella megacanthopora sp. nov., D. ramosa sp. nov., Leioclema explanatum Bassler, Monotrypa flabellata sp. nov., Rhombopora minima sp. nov., and Ptilo-dictya gracile sp. nov.

Spores from the Middle Old Red Sandstone of Cromarty, Scotland

Plant spores are described from the Cromarty nodule beds (Middle Old Red Sandstone) of Scotland. The spores include three new genera Cosmosporites, Rhabdosporites, and Ancyrospora. The genus Auroraspora Hoffmeister, Staplin, and Malloy is emended to include forms, with a light coloured central body, which closely resemble spores of the species Endasporites macromanifestus Hacquebard. In agreement, with Bhardwaj 1957 the genus Cristatisporites is here placed in the series Cingulati.

Restudy of types of seven Ordovician bifoliate Bryozoa

Restudy of original material and additional specimens for the type species of six bifoliate cryptostome genera indicates the need for revising the current suprageneric classification. The genera involved are regrouped into three informally named taxonomic categories. Escharopora recta Hall, Graptodictya perelegans (Ulrich), G. elegantula (Hall), and Stictoporella interstincta Ulrich are placed in the escharoporid group, Stictopora fenes-trata Hall, S.

Devonian spores from Melville Island, Canadian Arctic Archipelago

Twenty-four species of spores are described from a bituminous coal of Melville Island. Of these, twenty species of small spores and three species of megaspores are new, and two of the latter represent new genera, Hystricosporites and Circumsporites. Evidence suggests that lycopsids were dominant constituents in the flora which produced the spores. The assemblage differs distinctly from those described by Naumova (1953) and may contain elements of an uppermost Devonian-Lower Carboniferous flora, related to assemblages detected elsewhere in the Canadian Arctic.

The preservation of moulds of the intestine in fossil Nuculana (Lamellibranchia) from the Lias of England

The paper describes specimens of Nuculana from the Lower Lias in which clear moulds of the coiled intestine are preserved. The Nuculacea are deposit feeders in which the stomach and intestine become filled with compacted sediment from which nutriment is derived. In the present instance the shells remained closed and unfilled by sediment after death, while impregnation of the intestinal moulds with ferruginous matter and their hardening seems to have taken place very rapidly.

A Lower Cretaceous gastropod with fossilized intestines

Margarites (Atira) mirabilis sp. nov. is a small trochid gastropod of Lower Cretaceous (Albian) age and is found in the Lower Greensand (Folkestone Beds) of Kent and Surrey. A unique feature in the description of this fossil gastropod is an account of the digestive tract, based on discovery of a specimen in which the contents of the gut have been phosphatized, thus reproducing as a mould the form and internal structures of the organ. The presence of the intestinal groove with bordering typhlosoles, minor longitudinal folds of the intestine, and an anal sphincter are all clearly demonstrable.

Upper Mesozoic microplankton from Australia and New Guinea

Thirty-one species of microplankton from Upper Jurassic deposits in north-western Australia are identified, six new genera are proposed and the following new species described: Gonyaulax eumorpha, G. clathrata, G. bulloidea, Scriniodinium playfordi, S. dictyotum, S. ceratophorum, S.apatelum, Belodinium dysculum, Canningia reticulata, Hystrichosphaeridium pachydermum, H. torynum, H. capitatum, Cyclonephelium areolatum, C. densebarbatum, Cannosphaeropsis apiculata, Leiosphaeridia similis, Chlamydophorella wallala, Dictyopyxis areolata, Diplotesta glaessneri, Kalyptea diceras, K.
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