1901.] NATURAL SCIENCES OF PHILADELPniA. 605 



one animal moving forward. The hinder track seems to have, at 

 a couple of inches in front of it and a little to the right, a small 

 track, as if of the forefoot of the same animal. The forward 

 track is too near the edge of the slab to have that accompaniment. 

 At twenty inches back of the foremost toe-point of the hinder 

 track there appears at the other edge of the slab to be the toe- 

 point of another track, and a couple of inches in front of it per- 

 haps very indistinct traces of the small forefoot. Other less dis- 

 tinct footmarks can be perceived to the left of this principal line 

 of tracks. 



On liftino up the slab, however, it was found that the other side 

 had, in the absence of ripple marks, the cast of a number of other 

 Dinosaur tracks of about the same size, and likewise two or three 

 in succession at the same distance apart, and more distinctly accom- 

 panied by the impression of the small forefoot. In addition there 

 are a number of smaller tracks, about half an inch across, that 

 appear to be the footmarks of Labyriuthodonts. A. few other less 

 perfect impressions of ripple marks, raindrops and footmarks were 

 found by the party in other parts of the quarry. 



At the meeting of the Section on October 28, Messrs. Woolman 

 and Lyman were appointed a Committee to revisit the quarry, and, 

 if possible, send the slab to the Academy for preservation, which 

 was accordingly done on the '2d of November, Mr. Uselma C. 

 Smith kindly aiding in the work. It was found, however, on 

 arriving at the quarr}', that the ripple marks had in great part 

 been broken ofl from the slab by the members of the previous 

 excursion party, and the best of the tracks also removed from the 

 other side. Nevertheless, a number of tracks as well as a consid- 

 erable extent of the ripple marks were still left, and the slab was 

 taken. Another slab of equal surface and like shape was found, 

 and on turning over, proved to be the mate of the other, and to 

 have a complete and perfect cast of the ripple marks, as well as 

 some similar tracks on the other side. The uninjured slab was also 

 taken and sent to the Academy. Mr. Josiah H. Fisher, the 

 owner of the quarry, readily and freely made a gift of the speci- 

 mens, with admirable public spirit. 



A couple of smaller slabs showed very good ripple marking. 

 One of them, of irregular shape, about eleven inches long by nine 

 wide, and half an inch thick, has, on one side, shallow ripple 

 marks of about two and a half inches in amplitude; and, on the 

 other side, ripple marks of about the same dimensions, but sur- 

 mounted by what seem to be smaller ripple marks of about half 

 an inch in amplitude, or perhaps rillmarks: but may possibly be 

 very confused impressions of Dendrophycus. It appears, how- 

 ever, to be an interesting example of more than usually compli- 

 cated ripple marking. The slab has also very perfect worm tracks, 

 and several suu cracks. At the original examination of the 



