CONTENTS. 



Page 



Report upon Some Fresh-Water Sponges collected in Florida. By Edward Potts. 5 



Notice of Some Fossil Human Bones. By Prof. Joseph Leidy 9 



Description of Mammalian Remains from a Rock Crevice in Florida. By Prof. 



Joseph Leidy 13 



Description of Vertebrate Remains from Peace Creek, Florida. By Prof. Joseph 



Leidy 19 



Notice of Some Mammalian Remains from the Salt Mine of Petite Anse, Louisiana. 



By Prof. Joseph Leidy 33 



On Platygonus, an Extinct Genus allied to the Peccaries. By Prof. Joseph Leidy... 41 



v-Remarks on the Nature of Organic Species. By Prof. Joseph Leidy 51 



