Some Representative Invertebrates from the Cretaceous Period
http://www.cretaceousfossils.com/invertebrates/main_page.htm

Minor Keith


This site provides large, high resolution photos and information about a variety of Cretaceous invertebrate fossil specimens. Fossils are arranged taxonomically and can be viewed by clicking on the appropriate fossil group. Types of organisms covered on the site include Annelids, Jellyfish, Corals, Brachiopods, Echinoids, Gastropods, Crustaceans, Belemnites, Ammonites, and Nautiloids.

This resource is referenced here:
Subject: Biology
Resource Type: Scientific Resources:Overview/Reference Work, Audio/Visual:Images/Illustrations
Focus on the Cretaceous: Paleontology
Topics: Time/Earth History, Biosphere