24 
Cases 5 A and B. — Triassic fossils. Many types of the Car- 
boniferous Age continue to be prominent. Equisetum, belonging 
to the family of Equisetse, or “Horsetails” of the present day, 
and Pterrophylluni, of the order of Cycads, were most prominent 
among the land plants, and are illustrated by many specimens. 
Among the Lamellibranchs, the modern genus of Modiola is in- 
troduced. Ceratites represents the Orthoceras of early times from 
which it will be seen to differ in being coiled, and in having a 
more complex suture. 
Cases 5C, D, E, F, Q,6, 7, 8 A, B, C, Dand Walls of Hall 
5 9. — Jurassic fossils. 
This is the period when the class of reptiles reached its great- 
est development. Other interesting fossils which are found, may, 
however, be first noticed. 
Cases 5D, E, F, Q. — Among plants, Cycads are illustrated by 
several specimens of Cycadoidea. Among Invertebrates the 
beautiful Crinoid Pentacrinus, illustrated by three specimens on 
the south wall, is especially notable. Other Echinoderms are 
Cidaris, He7nicidaris, Pygaster and Clypeaster, the two latter be- 
ing allied to Clypeus or “sand dollar” of the present day. 
Brachiopods, mostly of the sloping shoulder type, are illus- 
trated by the genera Terebratula and Rhynchonella. Among bi- 
valve mollusks the introduction of the modern genus of Ostrea or 
oyster, is notable. A large number of beautifully preserved re- 
mains from the lithographic slate beds of Solenhofen are shown. 
They include some of the earlier Insects, and Crustacea resem- 
bling the modern lobster and king crab, Limulus, ^ger. 
Case 6 . — Ammonites, remarkable for size and complexity of 
suture. Many specimens are shown, including the genera Cardio- 
ceras, Arietites, Grammoceras. Some of the Arietites are 3 feet 
in diameter. The sutures of some specimens have been painted 
to bring out the markings. Many specimens of Nautilus and 
allied Cephalopods. 
Case 7. — Belemnites. These are allied to modern Cuttle- 
fishes and Squids. The only part of the animal usually preserved 
is the internal bone, or pen. Two restorations of the original ani- 
mal are shown. 
Cases 8A, B, C, D. — The Dinosaurs, or land reptiles, are 
illustrated by bones and vertebrae of the Teleosaur and casts 
showing various parts of the Megalosaur. Pterosaurs, or flying 
