Description of Three New Fossils from the Falls of the Ohio, 

 by Isaachar Cozzens. Read December 8th, 1S45. 



Although many of the states have employed competent geolo- 

 gists to explore their territories, it cannot be but that many objects 

 of Natural History must unavoidably have been unnoticed by them ; 

 this, I suppose to have been the case with the fossils I am to de- 

 scribe. 



About the year 1840, the late Rev. Benjamin O. Peers put into 

 my hands a number of fossils, which he informed me were obtained 

 at the falls of the Ohio river. After due examination of some twenty 

 or thirty distinct species, I selected three, which I believe to have 

 been hitherto undescribed. One of these, of which I have three 

 specimens, appears to be the buckler of a crustaceous animal ; the 

 other two are shells belonging to the classes mollusca and conchi- 

 fera ; the one a bivalve, and allied to the Spirifer of Sowerby or 

 Delrhyris of Dalman; the other a univalve, belonging to the family 

 of Orthocerata. I shall begin by describing the Crustacean. 



Genus Piliolites, (from mTdov, a scull cap.) 



Buckler gibbous, anterior and posterior margins, with a groove ; 

 the anterior groove deeper than the posterior, more slightly grooved 

 on the sides. 



* Ohioensis. Buckler gibbous, ovate, arched, margined, anterior 

 margin smaller and sloping downwards ; posterior, thicker and 

 turning up ; lateral margins very small. Plate X. fig. 1, a.b. 

 The three specimens from which this description is made, are 

 all precisely alike, both in form and size. They have the appear- 

 ance or shape of that part of the human skull which is above the eyes 

 and ears ; across the front is a furro w, and at the ends of this furrow 

 are placed small protuberances resembling eye-brows, under these 

 protuberances, the eyes were most probably situated as in living 

 crabs. The nearest recent species which this fossil relictresembles, 

 is the Leucosia craniolaris, Fabr.; but in this animal the front of 



