Here is an interesting specimen of a trilobite of the species Wujiajiania lyndasmithae which presents itself from the ventral side. 

This trilobite plate shows two specimens of the species Wujiajiania lyndasmithae. 

Here is a classic trilobite double with two specimens of the species Ogygiocarella debuchii. The two trilobites are 25 and 28 mm long. 

Here is a rather large specimen of a trilobite of the species Ogygiocarella angustissima from the Didymograptus artus biozone of Wales. 

Here is a detailed trilobite of the species Greenops widderensis from the Devonian of Canada.
This fully prone Greenops is about 30 mm long.

Here is a beautiful Ohio trilobite of the species Flexicalymene retrorsa.

Here is a beautiful and detailed trilobite of the species Flexicalymene senaria from the Verulam Formation of Canada. The trilobite is about 19 mm wide and would be about 30 mm long when fully stretched.

This Chang Jiang trilobite is a large specimen of the species Eoredlichia intermedia. The trilobite measures about 66 mm in length.

This Solnhofen Shrimp of the species Palinurina longipes offers a crisp preservation and a nice colour as well. The Palinurina including its very long antennas is about 51  mm long.
 

This is a relatively rare fossil Solnhofen fish of the species Anaethalion angustus from the Plattenkalk of Eichstätt. The anaethalion itself is about 97 mm long.
 

This Utah trilobite is a very detailed specimen of the relatively rare species Brachyaspidion microps.
The trilobite itself measures about 7 mm in length.

This Utah Trilobite is a large and detailed specimen of the species Elrathia kingi 

Here is a large specimen of a trilobite of the genus Megalaspides as the Ordvizian of Morocco.

Here is a fossil Megalodon tooth measuring approximately 137 mm, featuring a well-preserved root and an attractive light coloration. For comparison, the length is slightly over 5 inches.

This is a very large trilobite of the species Cambropallas telesto from the Middle Cambrian of the Jebel Ougnate region in Morocco. 

This is an interesting Megalodon tooth with two notable notches. These are likely to have been caused by both of the opposing teeth. 

This Megalodon tooth measures about  117 mm and features excellent preservation as well as an attractive light coloration. Its size corresponds to roughly 4.5 inches.
 

This  is an affordable specimen of a complete Megalodon tooth measuring about 41 mm, which is roughly 1.5 inches.

Here is an affordable specimen of an incomplete Megalodon tooth measuring about 85 mm, which is just under 3.5 inches.

Here is a small Megalodon tooth measuring about 43 mm, which is slightly more than 1.5 inches.
This tooth is of systematic interest because it still shows traces of the small lateral cusps. 

Here is a fossil Megalodon tooth measuring approximately 137 mm, featuring a well-preserved root and an attractive light coloration. For comparison, the length is slightly over 5 inches.

Here is an affordable specimen of a genuinely very large Megalodon tooth with a cutting edge length of approximately 161 mm. Although the tooth is incomplete, it still displays several attractive details and is particularly striking due to its remarkable size of about 6 inch.

Here is a fossil Megalodon tooth measuring approximately 137 mm, featuring a well-preserved root and an attractive light coloration. For comparison, the length is slightly over 5 inches.

This trilobite is an exceptional rarity of the species Chlustinia keyserlingi from the Czech Republic.