32 PROCEEDINGS OF THE ACADEMY OF [1889. 



NOTES ON GEOLOGY AND MINERALOGY. 

 BY JOHN EYERMAN. 



Fossil Foot-prints from the Jura (?)- Trias of New Jersey. — The speci- 

 mens to be described were collected two years ago at the quarries of 

 the Messrs. Clark, near Milford, Hunterdon Co., and after making 

 brief descriptions and drawings of the more interesting specimens, 

 they were immediately forwarded to the Museum of Comparative 

 Zoology, at Cambridge. No less than two hundred specimens were 

 collected ; many of them, however, were too indistinct to be determined. 



The following tracks have been accurately determined: 



The grouping is after Hitchcock. 



PACHVDACTVLOUS GROUP. 

 Genus I. BRONTOZOUM. 



B. isodactylum. (Hitchcock.) 



Two feet of three toes each. Length of foot 4 to 5 inches. Step 

 5 to 6 inches. The predominant species at this locality. On gray 

 sand-stone. 



Genus III. GRALLATOR. 

 G. cuneatus. (Hitchcock.) 



Two feet of three toes each. Length of foot 4 to 5 inches. Step 

 22 to 24 inches. On gray sand-stone. 



G. tenuis. (Hitchcock.) 



Two feet of three toes each. Length of foot 2 to 3 inches. Step 

 9 inches. On gray sand-stone. 



MARSUPIALOID GROUP. 



Genus II. ANOMOZPUS. 



A. minor. 



Two hind-feet of three toes each and two fore-feet of five toes 

 each. Length of hind-foot 82 inches; of heel 4 inches. Step 9 in- 

 ches. This track was first observed by Dr. T. C. Porter, in the quarry 

 of Smith Clark, about a half mile west of the quarry which furnished 

 the above (Brontozoum and Grallator.) The track is on the red 



