Description of six new species of Fossil Shells from the 

 Tertiary of Maryland and New Jersey. 



THE shells here described, are from that part of the Ter- 

 tiary mass called by Mr Lyell the older Pliocene Period. 

 They are presumed to be new, and their descriptions are 

 presented as a small contribution towards the elucidation 

 of that part of our Geology. 



BALANUS. Bruguiere. 



Balanus Finchii.* Plate 6. Fig. 222. 



Description. Shell short, conico-cylindrical, smooth, 

 nearly erect ; substance of the shell rather thick ; aper- 

 ture nearly square ; valves rather pointed above. 



Length 5-20ths, Breadth .3, of an inch. 



St Mary's, Maryland. John Finch. 



Observations. Although this shell has no striking 

 character, it cannot be placed with any species I am 

 acquainted with. I am under obligations to Mr Finch, 

 for this and many other species from St Mary's. He very 

 kindly placed them in my cabinet, shortly after his return 



* Named after the geologist to whom I am indebted for the specimen. 



