Notes on Cincinnatian Fossil Types 
313' 
Q 
influence of the form of supporting surfaces upon the form of closely 
sessile species, such as the Cranias here under discussion. 
Similar examples occur among the Cranias found in the Eden 
group, in the vicinity of Cincinnati, and for these also distinct 
specific terms were suggested in times past. There is a tendency 
to include these also as synonyms under Crania scahiosa, but a 
close study of the types of the Eden forms suggests at least the 
possibility of some of the latter belonging, at least in part, to a. 
distinct species. 
21. Crania scabiosa, Hall 
1868. Crania scabiosa Hall, Descriptions n. sp. Crinoidea and other Foss., p. 13 
1872. Crania scabiosa Hall, 2Jf.tb Rep. New York State Cab. Nat. Hist., p. 220, Plate' 
7, Fig. 15 
1892. Crania scabiosa Hall and Clarke, Pal. New York, 8, pt. 1 p. llf.8, Plate 4 H,, 
Figs. 23-28, 30, 31 
The first figured specimen of Crania scabiosa (24th Rep. New 
York State Cab. Nat. Hist.), here regarded as the type of the species,, 
consisted of a group of individuals attached to Platystrophia ponder- 
osa, and evidently was obtained from the upper part of the Mays- 
ville group, at Cincinnati, Ohio. The individuals are robust, thick 
shells, and although conforming to the plications of the supporting 
Platystrophia, they retain also very well the strong concentric 
lamellose markings which suggested the specific term scahiosa. In 
another specimen, also from Cincinnati, Ohio, and figured by Hall 
and Clarke (Pal. New York, 8, pt. 1), about thirty individuals, 
supported upon the brachial valve of Rafinesquina alternata, re- 
produce the radiating striations of the latter distinctly. 
Crania scahiosa is abundant also in the Richmond group,, 
especially in the Waynesville member. 
22. Crania multipunctata, Miller 
{Plate III, Figs. 13 A, B) 
1875. Crania multipunctata Miller, Cincinnati Quart. Jour. Sci., 2, p. 13, Fig. 4 
The type of Crania multipunctata, numbered 8869, in the Faber 
collection at Chicago University, is a thin upper valve, 7.5 mm. 
long, 8 mm. wide, and about 1.5 mm. high. The posterior outline 
is comparatively straight, and the apex of the valve appears to have 
been close to this margin, but no traces of concentric or radiating 
