PLATE 40. 
MIcHELINIA PRIMA, Nov. Spec. Magara. 
1. Under surface of corallum previously figured in Plate 39; Fig. 4. 
MICHELINIA PLANA, Nov. Spec. Devonian. 
2. Longitudinal section of a fragment from which the tabule are removed 
so as to show the mural pores; from the encrinal limestone clay 
of the Upper Devonian, near Louisville. Collection of the author. 
3. Longitudinal section of a fragment showing tabule; from the horizon 
and locality of the preceding example. Colléction of the author. 
MICHELINIA INSIGNIS. Devonian. 
4. Oblique view of the upper surface of a corallum, from the encrinal 
limestone clay of the Upper Devonian, near Louisville. Collec- 
tion of the author. 
5. Upper surface of a corallum from the horizon and locality of example 
4. Collection of the author. 
6. Vertical section of a corallum, showing tabulse, froin the same horizon 
and locality as the preceding examples. Collection of the author. 
