. College collection of palaeontology. ^ii^^^lll0immmmimmmmmtiiilliM bulacral portion is much elevated. This genus, one of the true Clypeas- tnd<e, includes the largest of sea-urchins. The shell is oblong; mouth angular and furnished with well developed teeth; tubercles'mere granules, and the spines proportionally small. The shell of this species is subpentagonal, and the am- From the Eocene Tertiary, Ghizeh, Egypt. No. 419. [814, Cast]. Clypeaster umbrella, Agass. This inflated form, with iuterambulacra rising into ribs, is from the Miocene Tertiary, Sardinia, and belongs to the Ward Colle
. College collection of palaeontology. ^ii^^^lll0immmmimmmmmtiiilliM bulacral portion is much elevated. This genus, one of the true Clypeas- tnd<e, includes the largest of sea-urchins. The shell is oblong; mouth angular and furnished with well developed teeth; tubercles'mere granules, and the spines proportionally small. The shell of this species is subpentagonal, and the am- From the Eocene Tertiary, Ghizeh, Egypt. No. 419. [814, Cast]. Clypeaster umbrella, Agass. This inflated form, with iuterambulacra rising into ribs, is from the Miocene Tertiary, Sardinia, and belongs to the Ward Collection, University of Roch- ester. This genus of the buckler-shaped group includes the largest of sea- urchins. The mouth is armed with well developed teeth. No. 420. Cyphosoma Texana. Cretaceous, Lampasas Co., No. 421. Discoidea subuculus, Leske. This Echinus has a hemispherical test, and very small tubercles arranged in concentric series. From the Upper Greensand (Cretaceous) of Yonne, France. No. 422. Echinobrissus (Nucleolites) scutatus, Gmel. Two SPECIMENS. This genus is a section made at the expense of NucUolites, to include those shortened and square forms with united poriferous zones. From the Coral Rag (Middle Oolite) of Weymouth, Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ward's Natural Science Establishment, inc. Rochester
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