204 CONTRIBUTIONS 



strongly resembling some of the smaller Saurians, but 

 which probably belonged to a fish. 



Plate 6. Fig. 218. 



Description. This figure 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 others it is obsolete.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 friend 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 I am 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 



