584 Annals of jhk Carnegif, Museum. 



several species which properly belong to the Trenton, and a few which must 

 have been incorrectly determined. 

 1858. BiLl.lNOS, E. On the Cyslidx of the Lower Silurian Rocks of Canada. 

 Canadian Geological Survey, Decade 3, p. 9. 



In this paper several cystids from the Chazy formation about Montreal 

 are described. 



1858. Jones, T. R. On the Paleozoic F)ivalve Kntomostraca of Canada. Canadian 



Geological Survey, Decade 3, p. 91. 



Several species of ostracods from the Chazy of the Ottawa Valley are de- 

 scribed. 



1859. IJii.i.iNcs, E. On the Crinoidea of the Lower Silurian Rocks of Canada. 



Canadian Geological Survey, Decade 4. 



The author describes a few species of crinoids from the Chazy formation 

 near Montreal, Canada. 



1859. I!ii. LINGS, E. Descriptions of Some New .Species of Trilobites from the Lower 

 and Middle .Silurian Rocks of Canada. Canadian Naturalist and Geologist, 

 Vol. 4, pp. 367-383. 



Describes and figures three new Chazy trilobites. 



1850. Billings, E. The Fossils of the Chazy Limestone with Descriptions of New 

 Species. Canadian Naturalist and Geologist, Vol. 4, pp. 426 to 470. 



In this most important paper a large number of new species are described. 

 Billings gives the total of Chazy species then known as 129, distributed 

 among the following classes : Zoophyta 6, Cystidea 7, Crinoidea 14, 

 Brachiopoda 21, Bryozoa 4, Lamellibranchiata 17, Gastropoda 21, Hetero- 

 poda 5, Cephalopoda 15, Trilobita 14, Entomostraca 4, Serpulites I. 



The genera, with the exception of some of the Cystidea and Crinoidea, 

 all pass upward into the more recent formations. Malocystites and Pa/ceo- 

 cvstites are peculiar to the Chazy, as are Palaocrinus, Pacliyocrimis and 

 Blastoidocriniis. It is stated that 21 species pass into higher formations. 



1859. Salter, J. W. On the Fossils of the Lingula Flags, or "Zone Primordi- 

 ale." Quarterly Journal of the Geological Society of London, Vol. XV, p. 



551- 



Under the title of .4,w////« (or Oleniis?) Salter describes and figures a trilo- 

 bite from the sandstone of the Ottawa Valley, Canada, which trilobite Bill- 

 ings described in the same year as Bnthyunis angelini. 



1861. Billings, E. On Some New or Little Known Species of Lower Silurian 

 Fossils from the Potsdam Group (Primordial Zone). Report of the Geology 

 of Vermont, Vol. 2, pp. 942-960. 



Describes Ainpyx halli, from Highgate Springs, Vermont. The same 

 article is reprinted in Paleozoic Fossils of Canada, Vol. i, 1865. 



1861. Hitchcock, E., kt al. Geology of Vermont, Vol. i, pp. 272-280. 



In this report E. Hitchcock gives the lithological characters, range, thick- 

 ness and fossils of the Chazy limestone in Vermont. The Black River lime- 

 stone is included in the Chazy in some of the descriptions, and in some cases 



