A Carcharocles megalodon shark tooth, with serrations and polished tooth enamel. 105 grams, 90 mm



From a Lincolnshire, UK, collection.

Carcharodon megalodon is regarded as one of the largest and most powerful marine predators in vertebrate history and likely had a profound impact on the structuring of the marine communities. Fossil remains indicate that this giant shark reached a length of more than 16 metres (52 ft) and also affirm that it had a cosmopolitan distribution. Scientists suggest that in life it looked like a stockier version of the great white shark, Carcharodon carcharias.

Comprising one hundred vivid canary-yellow specimens. 1.3 kg total, 10-50 mm



From Brazil. Ex Mineral Imports, London, UK. Gregory, Bottley & Lloyd (Gregory's), Harwich, UK.

Polygonal mortality display containing a large number of bivalves. 6.85 kg, 35.2 cm



From a Cambridgeshire, UK, collection.

Comprising three different types of insects, one likely a locust. 90 grams total, 47-56 mm



From Brazil. From the private collection of Kenneth Machin (1936-2020), Buckinghamshire, UK; his collection of antiquities and natural history was formed since 1948; thence by descent.

Thysanopeltidae scutellum on a textured matrix, showing detail of the characteristic fan-like tail shield. 386 grams, 99 mm



From the private collection of Kenneth Machin (1936-2020), Buckinghamshire, UK; his collection of antiquities and natural history was formed since 1948; thence by descent.

Large section of a fossilised vertebra with two raised projections on one side, possibly from a mosasaur. 407 grams, 96 mm3 3/4 in.



From Abingdon, Oxfordshire. From the private collection of Kenneth Machin (1936-2020), Buckinghamshire, UK; his collection of antiquities and natural history was formed since 1948; thence by descent.

The remains of a fossil crab set in a sedimentary matrix with its legs and claws curled underneath the body. 1.16 kg, 13.4 cm



From a Cambridgeshire, UK, collection.

Mixed group of bone and teeth fragments, including molars and canines. 193 grams total, 14-73 mm



Previously in several old Stone Age tool collections, having been annotated with two different accession numbers. Acquired from an Oxfordshire, UK, auction house. From the private collection of a West Midlands lady collector.

An irregular matrix with multiple Southern beech leaves. 301 grams, 18 cm



From the Redbank Plains formation, Ebbw Vale, Ipswich, Queensland, Australia. From the private collection of Kenneth Machin (1936-2020), Buckinghamshire, UK; his collection of antiquities and natural history was formed since 1948; thence by descent.

Comprising a set of six round coasters and a holder, carved from fossiliferous stone. 700 grams total, 91 mm



Ex Cambridgeshire, UK, collection.

Comprising six circular coasters, the Orthoceras have been polished through the shell to reveal the calcite preserved inside and showing the dividing gas chambers known as suture patterns. 682 grams, 91 mm wide



From a Cambridgeshire, UK, collection.

Restrung, using recently polished Mammuthus primigenius spherical bone beads. 148 grams, 62 cm



From a UK collection formed in the 1980s. Property of an Essex, UK, gentleman.

The mammoth lineage branched from the Asian elephant around 6 million years ago, and later on the Woolly Mammoth, Mammuthus primigenius, evolved in eastern Siberia. Woolly mammoths, being slightly smaller than living African elephants, were foragers and ate grass, as well as small, nutritious flowering plants that flourished in the environment where they lived. They may also have used their curved tusks to dig through snow and eat plants that other foragers were unable to reach.