1889.] NATURAL SCIENCES OF PHILADELPHIA. 33 



shale, and is rather indistinct. No other tracks have been found at 

 this locality. 



Tracks of Invertebrates. 

 Harpagopus dubius Hitchcock. 



Two toes. Length of foot 21 inches. 

 Tracks of Annelids. Hitchcock. 

 ITnisulcus Marshi Hitchcock. 



This track forms a beautiful loop; the groove is about | inch wide. 



Unisulcus minutus. 



This track is about tV inch wide. 



Jura (?)- Trias flora, from Milford. 



Only two specimens have been obtained ; both undoubtedly Clat- 

 hropteris platyphylla (Saporta.) 

 Some New Pennsylvania and New Jersey Mineral Localities : — 



Calamine occurs in stalactitic, botryoidal and granular massive 

 forms, coating limonite on the farm of S. D. Von Steuben, near 

 Dryland Station, Northampton Co. It resembles the Friedensville 

 calamine 



Friedensville Calamine: — An analysis of this calamine from the 

 Ueberroth mine made several years ago, afforded me 



Si 2 24-32 



Fe 2 3 2-12 



H 2 O 786 



Zn O 65-05 



99-35 



I believe this to be the first recorded analysis of calamine from 

 this well-known locality. 



Molybdenite occurs in thin plates incrusting quartz, at Marble 

 Hill, in Warren Co., N. J., opposite Easton. 



Graphite also occurs at the same locality incrusting granite. 



Malachite occurs at Flint Hill, near Bingen, Northampton Co., in 

 light-green masses associated with quartz, and incrusting the Meso- 

 zoic conglomerate it is found near Leithsville. 



It is also found at the sand-stone quarry of the Messrs. Clark, near 

 Milford, N. J. 



