TRANSACTIONS OF THE 



been already noticed. Probably all of them belong to 

 the genus Palseothrissum, (Blainsville.) I am inclined 

 to believe that I have found four species." Vid. p. 236, 

 pi. xiv., fig. 44, 45, 46. 48. 



As is generally the case, the fish appear to have lain 

 on their sides when enveloped in the rock. 



There are doubtless numerous localities of fossil fish 

 in our widely extended country, which have not yet 

 met the eye of a scientific naturalist. An intelligent 

 friend has recently furnished us with a notice of a very 

 interesting locality of this nature ; he is the proprietor 

 of a marble quarry situate in " Oval Limestone Val- 

 ley," or " Nipnose Valley," on the west branch of the 

 Susquehanna river, Pennsylvania. The marble is a 

 greenish colored conglomerate, somewhat resembling 

 verd antique, and admits of a high polish, being fine 

 grained and hard, interspersed with softer spots of an 

 argillaceous nature. Some parts of this marble are re- 

 presented as being replete with the remains of fossil 

 fish, about the size of a herring or carp ; some speci- 

 mens retaining the impressions of the scales; others 

 only of (he bones. The stone was too brittle to permit 

 the obtaining of any of the specimens whole. 



