| Isotelus "mafritzae" Lindsay Fm. Colbourne, Ontario, Canada Size: The trilobite is about 3.5 cm This is a ventral view of a partial trilobite. The HYPOSTOME is clearly visibile. Price: $75 US ID number: fs709 | 
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| Isotelus "mafritzae" Lindsay Fm. Colbourne, Ontario, Canada Size: The trilobite is about 3.5 cm This is a ventral view of a partial trilobite. The HYPOSTOME is clearly visibile. Price: $75 US ID number: fs709 |
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