PLATE 27, 
MICHELINIA INSIGNIS. Devonian. 
1. View of the epithecated under surface of a corallum, showing the 
semi-cylindrical ‘shape of the outer walls; to the left of the center 
several of the corallets become temporarily disjunct, but again 
unite with their neighbors by approximation; from the encrinal 
limestone clay of the Upper Devonian, near Louisville. Collection 
of the author. 
FavositEs convexus, Nov. Spec. Devonian. 
2. View of the under surface of a corallum from which the epitheca is 
removed so as to show the mural pores and squamous walls; from 
the ferruginous clay of the Lower Devonian, near Louisville. Col- 
lection of the author. 
3. (Central small specimen.) View of the under surface of a small 
corallum, covered with a deeply-wrinkled epitheca; from the Lower 
Devonian, Falls of the Ohio. Collection of the author. 
Favosites Munbus, Nov. Spec. Devonian. 
4. Upper surface of a corallum in which the larger sub-rotund tubes are 
more regularly recurring than is common; from the blue clay of 
the Middle Devonian, Falls of the Ohio. Collection of the author. 
FAvositEs RoTUNDITUBA, Nov. Spee. Devonian. 
5. Upper surface of a corallum from the encrinal limestone clay just 
below the shale of the Upper Devonian, near Louisville. Collec- 
tion of the author. 
FavositEs proximus, Nov. Spec. Devonian. 
6. Upper surface of a corallum of expanded discoidal shape, composed 
of corallets whose tubes are above average size; from the ferru- 
ginous clay of the Lower Devonian, near Louisville. Collection 
of Dr. Knapp. 
FavosiTEes Eximtius, Noy. Spee. Devonian. 
7. Lateral view of a corallum of turbinate form, from the dark red 
encrinal limestone clay of the Upper Devonian, near Louisville. 
Collection of the author. 
