204 CONTRIBUTIONS 
strongly resembling some of the smaller Saurians, but 
which probably belonged to a fish. F 
Plate 6. Fig. 218. 
Description. Thisfigure represents one of the fossils men- 
tioned above. It resembles the bone found in the head of 
fish. It is subelliptical, curved—on the inferior part irregu- 
larly impressed—on the superior part smooth with a rather 
irregular longitudinal impression like a tulip having a — 
curved stem. In some specimens this is very perceptible, in 
others it is obsolete. Two specimens were found in some 
sand from the Older Pliocene of Maryland, at St Mary’s. 
Plate 6. Fig. 219. 
Two views, front and lateral. 
These figures represent the tooth mentioned above. 
A single specimen only was obtained. Considering it 
of much importance in the history of the stratum, it was 
submitted to the examination of my fiiend Dr Hays, 
whose experience in this branch of Natural History is 
so advantageously known. His note, embracing also 
observations on two other specimens of organic remains, 
which accompanied it, will be found below.* 
* My Dear Sir,—I have examined the fossils you were so kind as to 
send me, with as much attention as my pressing avocations would per- 
mit. 
1. The tooth appears to be that of a fish, but lam unable to determine 
the species; probably it belongs to an undescribed one. Its crown is 
lanceolate, projects laterally, slightly beyond the body, and the enamel 
