226 PROCEEDINGS OF THE [July, 1889. 



JULY 25th, 1889. 

 Dr. G. E. ManictAult in the Chair. 



The Chairman exhibited a curious specimen which had been found in the 

 neighborhood of a pile of phosphate rock, at the east end of Hasel Street, in 

 this City, not far from several iron foundries and machine shops. Its general 

 appearance, where the surface has not been bruised, is that of a coprolite, and 

 if it is one, it is a part of the excrement of either an elephant or a mastodon. 

 Its shape is a truncated cone with the smaller end rounded, and the base has 

 been rubbed or ground artificially, so as to present a flat surface upon which 

 the specimen rests without difficulty. The entire unbruised surface is black, 

 which proves it to have been dredged from one of the adjacent rivers. 



Dr. Manigault suggests that it is probably the concluding part of a voiding 

 effort of one of the animals mentioned, and thinks that the explanation of the 

 fact of the base being ground is, that it was doubtless used by the workmen in 

 one of the shops to smooth off their grindstone, and had been mislaid when dis- 

 covered on an adjacent pier. It has been placed among the local fossils in the 

 College Museum. 



AUGUST 22d, 1889. 

 Dr. G. E, Manigault in the Chair. 

 The following communication was read : 



Additional Note on Pieris monuste. 



BY ELLISON A. SMYTH, JK. 



This Spring ( 1889) Pieris monuste was quite abimdant in the City. I first 

 noticed a male and several females in April, from which time on, until the 

 middle of July, when I left the City they gradually increased in abundance. 

 The females were nearly all of the smoky type, and I observed two forms of 

 coloring, both equally abundant. A very noticeable feature was the fact that 



