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The Australian Permian 'burrowing' bivalves have large external ligaments which may be either replaced by calcite or have their outer surfaces preserved as external and internal moulds. Sections of two such replaced ligaments of Pyramus laevis and Megadesmus nobilissimus show three layers which probably correspond to the inner, outer, and fusion layers of living bivalves.

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Scelidosaurus harrisoni Owen, the type species of the genus, is reconsidered using all available material. Evidence is given that the lectotype chosen by Lydekker is unsuitable, as it is a megalosaur, not an ornithischian, and it is proposed to make an application to the International Nomenclature Commission to designate an alternative specimen.

• Read more about The Jurassic dinosaur Scelidosaurus harrisoni, Owen

Twenty species of tabulate corals from the Ilfracombe Beds of North Devon are figured and described; of these, Chaetetes multitabulatus is a new species and most of the others are recorded for the first time from North Devon.

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Jamoytius kerwoodi White, based on two specimens from the Silurian of Lanarkshire, Scotland is reviewed in the light of many new specimens from the original locality. The associated fauna and probable habitat are discussed. Jamoytius is shown to be a cephalaspidomorph agnathan closely related to the anaspids and to the living cyclostomes. The presence is established of an annular cartilage, of sclerotic cartilages and of a cyclostome-like branchial basket. Lateral trunk scales of unusual structure and composition are present.

• Read more about New evidence on Jamoytius kerwoodi White, an important ostracoderm from the Silurian of Lanarkshire, Scotland

Propectinatites websteri gen. et sp. nov., sub-family Virgatosphinctinae, from the Autissiodorensis Zone of the Lower Kimmeridge Clay of Dorset, is described and figured. Dimorphism is recognized in this genus.

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Oyster distribution on certain Kimmeridgian ammonites is consistent with -attachment occurring after the death of the ammonites.

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Pseudoclimacograptus hughesi (Nicholson) and P. undulatus (Kurck) are placet in the new subgenus P. (Metaclimacograptus) with the former species as type. The following new subgenera and species are described: Pseudoclimacograptus (Clinoclimacograptus) retroversus subgen. et sp. nov. and Glyptograptus (Pseudoglypto-graptus) vas subgen. et sp. nov.

• Read more about Some new diplograptids from the Llandovery of Britain and Scandinavia

Three species of Mariopteris are described from Stephanian B-C rocks in North-west Spain. The record is based only on five specimens, but it proves that Mariopteris was by no means extinct by Lower Stephanian times, as so often has been stated in the literature. The validity of the genus Pseudomariopteris is questioned.

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• Read more about Correction of name for a Devonian megaspore

Previous workers considered that Globigerinoides ruber d'Orbigny 1839 ranged, with no appreciable morphological change, from early Miocene (Globigerinita dissimilis zone) to Recent. The present study, based on material from various parts of the world, suggests that the early to Middle Miocene forms can be distinguished from the Uppermost Miocene to Recent forms on the basis of ontogeny and phylogeny. The early to Middle Miocene forms are referred to Globigerinoides subquadratus Bronnimann 1954, which is redefined, the younger forms (Uppermost Miocene to Recent) to G. ruber.

• Read more about The development of Globigerinoides ruber (d'Orbigny 1839) from the Miocene to Recent