26 
— other common Brachiopods. Eurypterus— Crustaceans closely 
allied in structure to modern Scorpions, but being water breathers 
are classed with the Crustacea. A large number of specimens 
from the Water-lime group of New York. 
Case 2F. — Foreign Silurian fossils. From the Wenlock 
limestone of England, several specimens of Pe?'iechocrinus , Cya- 
thophyllum and others. From the Bohemian beds, several species 
of Graptolites, the genera Phacops and Dalmanites among Trilo- 
bites, and many specimens of the Orthoceras family. 
Cases 2G, Hand 3. — Fossils of the Devonian Age or age of 
fishes. The fishes which by their size and abundance characterized 
this age, belonged to two orders— Ganoids, represented at the 
present day by the garfish and sturgeon, and Placoids, the order 
which includes sharks, skates and rays. They differed in many 
respects from the fishes of the present day, however. The Ganoids 
were covered with thick, bony scales, had teeth of reptilian char- 
acter and jointed, paired fins. The Placoids had cartilaginous 
skeletons, no scales, no gill covers, and many of their characters 
were embryonic. 
Case 2G. — Lower Devonian fossils of the Corniferous 
period. Favosites — Honey-comb corals. Heliophyllum — Cup 
corals. 
Ophiura , Loriolaster — Asteroids similar to modern starfishes. 
Being free-moving Echinoderms, they mark the introduction of a 
higher type than the attached Crinoids. Macropetalichthys — a 
Ganoid fish. 
Case 2H — Lower Devonian fossils. Syringopora — Chain 
corals. Zaphrentis — common and characteristic cup corals. Or - 
this, A try pa, Spirifer— Brachiopods. Coccostens — a typical Ga- 
noid from the Old Red Sandstone of Scotland. 
Case 3A. — Middle Devonian fossils. Psilophyton , Spheno- 
pteris , etc., — early land plants from the Devonian beds of St. 
John, N. B. They were of low orders, chiefly mosses and ferns. 
Holopty chins, Glyptolepis, Diplopterus — fishes from the Old Red 
Sandstone of Scotland. These are nearly all Ganoids, as may be 
seen from the large, bony scales with which they are covered. 
Cyathophyllum, Cystiphyllum, Zaphrentis — Cup corals. 
Case 3B. — Upper Devonian fossils. Large, polished masses 
of Acervularia from Iowa, a honey-comb coral. Dictyophyton — 
