234 ~R. S. Lull — Carboniferous Footprints. 



Aut. XVII. — An Upper Carboniferous Footprint from 

 Attleboro, Massachusetts ; by Richakd Swann Lull. 



[Contributions from the Paleontological Laboratory, Peabody 

 Museum, Yale University, New Haven, Conn.] 



In a quarry about 1V 2 miles southwest of the railroad 

 station at Attleboro, Massachusetts, there was found a 

 slab of dark micaceous shale bearing certain footprints 

 and invertebrate trails apparently new to science. The 

 specimen was loose in the quarry, but there is no question 

 as to its being in situ, as it was discovered in the presence 

 of Professor J. B. Woodworth of Harvard University by 

 one of his students, Mr. Fred. Garnjost. 



Stratigraphically, the specimen comes from strata im- 

 mediately below the "Dighton" conglomerate 1 and is, 

 therefore, as Professor Woodworth writes : 2 



"very high Alleghanian if not higher, but below the coarse con- 

 glomerates which cap the Rhode Island Coal Measures in all the 

 synclinal axes of the Narragansett area. The beds are higher 

 than those which at Plainville near "Wrentham carry very small 

 footprints, one of which I have described. ' ' 



The surface of the slab is somewhat undulatory and 

 bears rain-drop impressions, which add to the difficulty 

 of interpretation. There is, however, the unquestionable 

 imprint of the hind foot of a quadrupedal form of consid- 

 erable size and at least two much smaller handprints, 

 neither of which bears a normal position relative to that 

 of the pes. They do, nevertheless, doubtless pertain to 

 the same individual, and as such they will be described. 

 There is a possibility, which was recognized by Professor 

 "Woodworth, that the hind foot track may have been in 

 part obscured by another impression, which would ac- 

 count for the apparent abnormality of digit 1. If this be 

 true, I am unable to differentiate the occulting track. 



Dromopusf woodworthi, n. sp. 



' Manus (Fig. 1, m). — Tetradactyl, plantigrade, with 

 rounded palm and diverging digits, terminating in 

 rounded claw impressions. Divarication of digits 1 



1 See Monograph XXXIII, U. S. Geol. Survey. 



2 J. B. Woodworth, Bull. Geol. Soc. America, 11, 449-454, figs. 1, 2, pi. 40, 

 1900. 



