314 
Aug. F. Foerste 
striae are seen. The specimen, during life, evidently rested upon 
some bryozoan, the cells of which have been reproduced to some 
extent in the surface strcture of the upper valve. Of these cells 
there were 8 in a length of 2 mm., and these cells were arranged in 
rows crossing each other diagonally. They are best preserved on 
the right side of the specimen and near the posterior margin. 
Crania multipunctata was described as coming from near the 
upper part of the hills at Cincinnati, Ohio, and presumably was 
found in the Corryville member of the Maysville. 
23. Crania costata, James 
{Plate Illy Fig. 15) 
1879. Crania costata, James, Paleontologist, 3, p. 22) 
The type of Crania costata is preserved in the Welch collection in 
the college at Wilmington, Ohio. In its younger stages of growth it 
evidently was attached to some brachiopod with strong radiating 
plications, or possibly to some Byssonychia. These radiating plica- 
tions have left their impress upon the Crania, traversing the latter 
in only one direction, and not radiating from the apex of the valve, 
as in Crania laelia and Crania albersi. At present, the valve is 
attached to a fragment of shale. The specimen evidently was ob- 
tained from some part of the Richmond, but the exact horizon is 
unknown. 
24. Crania asperula, James 
{Plate III, Figs. 9 A B) 
.1879. Crania asperula James, Paleontologist, 3, p. 22 
The type of Crania asperula is preserved in the Welch collection 
deposited in the college at Wilmington, Ohio. The fragment of rock 
to which the Crania is attached shows traces of Hehertella insculpta, 
Bythopora delicatula, and Helopora harrisi, and evidently was found 
in the Hehertella insculpta layer at the base of the Liberty member 
of the Richmond, at Clarksville, Ohio. In its earlier stages at least 
it was attached to the upper part of the brachial valve of a Hehertella 
insculpta, near the beak, and both the radiating plications, and the 
much finer transverse striations of this shell have left their impress 
upon the Crania. The latter is regarded merely as an interesting 
example of Crania scahiosa Hall. 
