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This paper gives descriptions of three fructifications from a Lower Carboniferous horizon in the Kilpatrick Hills, Dunbartonshire. Two new specimens of Protopitys scotica Walton provide further information about the structure of the stem and spores of this species. Staphylotheca kilpatrickensis gen. et sp. nov., probably the pollen-bearing organ of a pteridosperm, has yielded fertile and abortive spores. Calathiops trisperma sp. nov. is a pteridosperm fructification consisting of small cupules, each containing three ovules. The affinities of the three species are discussed briefly.

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The histology of the long bone of a prosauropod dinosaur is described. The bone is in very good condition and is still birefringent like recent bone. The bone has a laminar histological pattern, quite unlike that of recent reptiles, but very like that of recent artiodactyls. The vascularization of the dinosaur bone is compared quantitatively with that of recent mammals and reptiles. The amount of vascularization is much greater than in recent reptiles, and is of the same order as, but rather more than, in recent mammals.

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The rich Ludlovian bryozoan fauna is discussed and twenty-five species are described, thirteen of them new—Dekayella whitcliffensis, Leptotrypella leintwardinensis, Batostomella hemiseptensis, B. hexamesopora, Bythopom parallela, Eridotrypa umbonensis, Leioclema ludlovensis, L. halloporoides, Anaphragma shucknellensis, Calamotrypa mttlichopensis, Monotrypa patera, Nematopora hexagona, and Rhombopora mesopora. The hollow Calamotrypa is described as a new Trematoporid genus. Monotrypa crenulata Nicholson is discussed and a lectotype chosen.

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The two new species of root A. bovius and A. equivius are described from the Cementstone Group of the Scottish Lower Carboniferous. The genus Atnyelon Williamson is reviewed and an emended diagnosis given. The discussion includes a review of palaeozoic roots and their taxonomic treatment together with some comments on the structure of palaeozoic woods of gymnospermous type.

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Plant spores are described from Middle Old Red Sandstone deposits of the Orcadian basin, Scotland. The genus Ancyrospora Richardson 1960 is reinterpreted. The species Hystricasporites corystus, Perotrilites bifurcatus, Ancyrospora longispinosa are new. In addition the most numerous spores are included in the species Ancyrospora ancyrea (Eisenack) comb. nov. which is subdivided into the varieties A. ancyrea var. ancyrea var. nov., A. ancyrea var. brevispinosa var. nov., and A. ancyrea var. spinobaculata var. nov. The range of variation of A.

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Pagea sturrocki gen. et sp. nov., a new stylonurid eurypterid from the Lower Old Red Sandstone of Angus, is described. The genus is characterized by the possession of ctenopterid-type prosomal appendages, but other features of the prosoma resemble those of Stylonurus s.s. The affinities of the new genus are fully discussed and its anatomy compared with that of other stylonurid genera. Finer characters of the anatomy of the prosoma and prosomal appendages of Scottish type material of Stylonurus s.s. and Ctenopterus are described for the first time.

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Previous records of calcareous adherent Foraminifera from the British Jurassic are reviewed and the presence of four genera, Buttopora Quenstedt, Carixia Macfadyen, Nubecularia Defrance, and Nubeculinella Cushman, is established. Emended diagnoses for three of these genera are given and the type species of one, Nubecularia lucifuga Defrance, is redescribed from topotype (Eocene) material. All the species and varieties of the Jurassic genera, including certain free-living forms, are redescribed, and their morphological variation, diagnostic characters, and stratigraphical ranges are given.

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The genus Pseudolittia Maubeuge is redescribed on the basis of new material, and Ammonites emilianus Reynes is assigned to it. The genus is characterized by straight ribs which die out on the later whorls and by decrease in the relative diameter of the umbilicus with increasing size of the shell. It is provisionally placed in the Subfamily Grammoceratinae.

• Read more about New information on the Toarcian ammonite genus Pseudolillia Maubeuge 1949

The work of figuring and interpreting the Yorkshire Mesozoic ammonite species of Young and Bird, Phillips, and Martin Simpson started by Buckman in his well-known Yorkshire Type Ammonites is completed and critically revised. In addition to the Jurassic ammonites dealt with by Buckman, the nautiloids and Cretaceous ammonites are also figured and interpreted, as well as the remaining Jurassic ammonites. The type specimens of 38 species are figured, many of them for the first time.

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A new lycopod cone, Sporangiostrobus ohioensis sp. nov., is described from the Pennsylvanian of Ohio, U.S.A. It contains megaspores similar to Superbisporites superbus (Bartlett) Potonie and Kremp, and microspores agreeing with Densosporites solans Balme. The genus Densosporites Berry sensu Potonie and Kremp is now known to represent at least two distinct groups of lycopods, and this offers a basis for a natural subdivision of the genus. An emended diagnosis of Sporangiostrobus is given.

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