83 



and faunas in the State of New York, characterizing the close of the 

 Devonian epoch. The equivalencies in time and true relations of the 

 faunas were clearly delineated, and much satisfaction with new 

 light resulted from the observations made by Prof. Hall. Messrs. 

 1. C. White, E. W. Claypole, J- J- Stevenson, and others took part in 

 the discussion. 



"On the dentition of Tica:iichthys and its allies," was t'he subject 

 of an interesting paper by Prof. E. VV. Claypole, giving the result of his 

 observations on the jaws of the gigantic fish which existed in Djvonian 

 times. An important matter relating to Devonian fishes caaie up at 

 this meeting of the Geological Society, regarding the mode of occurrence 

 or origin and habitat ot the Devonian fishes. Were th.'y freshivifer or 

 marine f\s\\ts7 Were they lacustrine or sea fishes. Prof J. J. Stevenson 

 argued for their marine charac er, and Prof Claypjlefor their fresh- 

 water nature. A revision of the evidence on this point is necessary 

 before a conclusion cm be arrived at. 



Other papers read were as follows : — 



Lawrence C. Johnson. — Notes on the Phosphate Fields of Eastern 

 Marion and Alachua Counties, Florida. 



G. F. Becker.— Finite homogeneous strain, (low and rupture of 

 rocks. 



Wm. H. Hobbs. — Phases in the metamorphism of the schists of 

 Southern Berkshire. 



Charles L. Whittle, — Some dynamic and metasomatic phenomena 

 in a metamorphic conglomerate in tne Green Mountains. 



G. C. Broadhead. — The Ozarks and the geological history of the 

 Missouri Palaeozoic — lo minutes. 



David White. — A ncA'Tseniopterid fern and its allies — lo minutes. 



A. S. Tiffany. — The overturn of the Lower Silurian Strata in 

 Rensselaer County, N.Y. — 5 minutes. 



Ancient Waterfalls. — 7 minutes. 



Of these last seven some were read by title others in extenso and 

 others were briefly sketched out. Mr. David White's paper on a new 

 Taeniopterid fern was a pleasing contribution lo Paleobotany and 

 showed those present how exceedingly careful a pala-eobotanis' has to be 

 in separating portions of the same plant, parts of which at times resemble 



