396 Scientific Intelligence. 



2. On the presence of a . Limestone Conglomerate in the Lead 

 region of St. Francis Co., Missouri ; by Frank L. Nason. 

 (Communicated.) — For the past two months, the writer has been 

 engaged in geological work in the disseminated lead fields in St. 

 Francis County, Missouri. During the progress of the work a 

 heavy bed (or beds) of limestone conglomerate has been discovered 

 separating the St. Joseph, or Bonne Terre, limestones from the 

 formation known as the Potosi. The interstitial filling of this 

 conglomerate is a pure coarsely crystalline limestone, in sharp 

 distinction to the magnesian limestone or dolomite which forms 

 the pebbles. The interstitial part is filled with fragments of 

 trilobites, brachiopods and possibly crinoid stems, all undeter- 

 mined at present. I wish to announce now this discovery, which 

 is of great importance geologically and promises to be of even 

 greater importance economically in relation to the disseminated 

 lead deposits of this section of Missouri. In a few weeks I hope 

 to publish a geological section showing the relative position of 

 the conglomerate with reference to the St. Joseph limestones 

 and the Potosi. 



3. New Species of Cambrian fossils from Cape Breton ; by 

 G. F. Matthew, Nat. Hist. Society of New Brunswick Bulletin, 

 vol. iv, p. 219, with a plate. (Abstract by the author.) — In this 

 paper on fossils from the Upper Cambrian of Cape Breton, nine 

 new speoies and forms are described. These are referred to the 

 several zones of Parabolina, Peltura and Dictyonema. The 

 internal features of the valves of several of the Brachiopods are 

 described and figured. An enlarged figure shows the compli- 

 cated structure of the group of central muscles in Lingulella. A 

 new Schizambon described is a minute orbicular form from the 

 Dictyonema zone. This and a new Acrotreta have been found 

 also in the Cambrian Basin at St. John, N. B., Canada. 



The trilobites are of three genera, Parabolina, Sphseroph- 

 thalmus and Agnostus. The first genus is represented by a 

 species with a strongly arched front to the cephalic shield, but in 

 other respects strongly resembles the European forms referred to 

 this genus. The Agnostus is a fine example of A. trisectus of 

 Salter, but differing in the markings of the surface of the shield 

 and in having a tubercle at the back of the rhachis of the 

 pygidium. 



4. Geological Survey of Western Australia. — The Annual 

 Report for the year 1899 has been recently issued. It contains 

 an account of the Greenbushes tin fields, by the Government 

 geologist, A. Gibb Maitland, with a detailed geological map; 

 also of various gold fields, chiefly in the Coolgardie district, 

 accompanied by geological maps. The mineralogist, Mr. Edward 

 S. Simpson, gives results of assays of some twelve samples of 

 native gold, in part nuggets, but chiefly from quartz reefs. Most 

 of them show the presence of a considerable percentage of silver, 

 from 3 - 5 to 10*5 p. c. The lowest specific gravity observed 

 (14-66) is that of the " Bobby Dazzler " nugget, which yielded 



