61 Savage and Crooks — Early Silurian Rocks. 



A noteworthy fact in connection with the fauna of 

 these rocks in northern Michigan is the presence of 

 Camarotcechia,? winiskensis in all of the exposures of 

 both the Hendricks dolomite and the Fiborn limestone 

 that were examined. This species was described by 

 Whiteaves from the lower strata of the Silurian system 

 near the mouth of Winisk River, west of Hudson Bay; 

 and has more recently been found by the senior writer 

 in rocks near the base of the Silurian not only along that 

 river, but also along the Ekwan and the Severn rivers 

 in that region. In all of these localities it came from 

 Silurian rocks which had been considered about the age of 

 the Gruelph, but which are thought by the writer to be 

 probably pre-Niagaran in age. These occurrences sug- 

 gest that during a part of Alexandrian (Edgewood) time 

 there was an extension of the Arctic sea as far south as 

 Michigan and Wisconsin, in which the early Silurian 

 rocks of these states were laid down. 



University of Illinois, 

 Urbana, 111. 



Aet. IV. — A Second Meteorite Find in Florida;* by 

 Geobge P. Merrill, Head Curator of Geology, U. S. 

 National Museum. 



The stone described below was received from Mr. John 

 W. Alger of Eustis, Florida, accompanied by the state- 

 ment that it was found by his father when plowing some 

 new land from which the trees had been recently cut. 

 The soil was what is locally known as high, sandy pine- 

 land and the stone lay but four inches below the surface. 

 Although considerably discolored by oxidation, its mete- 

 oric nature was at once recognized. As received the 

 stone was plainly a fragment from a larger mass frac- 

 tured before reaching the earth. The primary incrusta- 

 tion was still evident over a considerable portion of the 

 surface with thinner crusts on surfaces of more recent 

 fracture. The weight of the entire mass was but 502 

 grams. 



* Published with permission of the Secretary of the Smithsonian Insti- 

 tution. 



