37 



Ordinary Meeting, February 1.0th, 1885. 



Professor W. C. Williamson, LL.D., F.R.S., President, 

 in the Chair. 



Mr. J. A. Bennion, M.A., and Mr. A. Brothers were 

 appointed Auditors of the Treasurer's Accounts. 



" On some undescribed tracks of Invertebrate animals 

 from the Carboniferous rocks, and on some inorganic pheno- 

 mena, simulating plant remains, produced on tidal shores," 

 by Professor W. C. Williamson, LL.D., F.R.S., President. 



Professor Williamson's Memoir first contained descriptions 

 and figures of a new form of Chrossocorda, which he named 

 C. tuberculata, from the Yoredale rocks of Stony hurst, in 

 Lancashire, which genus has hitherto been found only in 

 Palceozoic rocks of nmch older age than the Yoredale beds. 

 Reciting the views of Schimper and others, who believe 

 that the genus Chrossocorda represents some Fucoidal form 

 of Palaeozoic life, the author regards the various modifica- 

 tions of it as consisting of tracks of Marine animals, probably 

 Crustaceans. He assigns the name of Chrossochorda tuber- 

 culata to that now described. 



A second form of track, of a different type, was found by 

 Mr. J. W. Davis, F.G.S., of Chevinedge, near Halifax. It 

 consists of a line of curved footprints in groups of eight — 

 four on each side — the successive groups varying from five- 

 eighths of an inch to two inches apart from each other. 

 The specimen described was found in a Quarry of Yoredale 

 beds, near Hawes. The author assigns to it the name of 

 Protichnites Davisi, after its discoverer. 



Casts of two series of mai'kings, produced by water, were 

 Pboceedings— Lit. & Phil. Soc— Vol. XXIV.— No. 6.— Session 1881-5. 



