PLATE 39. 
MICHELINIA CoRRUGATA, Nov. Spec. Devonian. 
1. Upper surface of a corallum from the Middle Devonian, Falls of the 
Ohio. Collection of the author. 
MICHELINIA NIAGARENSIS, Nov. Spec. Niagara. 
2. Portion of the upper surface of a corallum from the Upper Niagara 
white clay, near Louisville. Collection of the author. 
MicHELINIA PRIMA, Nov. Spec. Magara. 
3. Upper surface of a weathered specimen, in which the walls of the 
several corallets are seen separated; from the white clay of the 
Upper Niagara, near Louisville. Collection of the author. 
4, Artificially attached to Figure 6 is a corallum whose lateral view 
showing epitheca is presented. Not photographed satisfactorily 
on account of its color. From the same horizon, near Louis- 
ville, as example 3. Collection of the author. 
5. Upper surface of a fragment showing tube-walls delicately spinulous, 
in exquisite preservation; from the same horizon and place as the 
preceding example. Collection of Mr. McConathy. 
MICHELINIA PLANA, Nov. Spec. Devonian. 
6. Lateral view of a corallum from the dark red clay beds derived from 
the encrinal limestone of the Upper Devonian, near Louisville. 
Collection of the author. 
MICHELINIA INSIGNIS. Devonian. 
7. Upper surface of a corallum whose corallets have thinner walls than 
the average specimen; from the encrinal limestone clay of the 
Upper Devonian, near Louisville. Collection of the author. 
