CV1 



BRITISH GRAPTOLITES. 



1885. 

 Dawson, 

 " Graptolites of tlio 

 Quebec Group," ' Red- 

 path Museum Report,' 

 January. 



1886. 



Lapworth , 



" Preliminary Report on 



some G-raptolites from 



the Lower Palaeozoic 



Rocks on the South of 



the River St. Lawrence, 



etc.," ' Trans. Roy. Soc. 



Canada,' sect. 4. 



In a short note referring to " Graptolites of the Quebec 

 Group," collected by Mr. Richardson for the Montreal 

 Museum, Dawson describes a new species of Dictyonema 

 (l>. delicatulum) from the Point Levis at Fort, No 2, and 

 records the occurrence of ]). sociale in the black shales of 

 Matane. 



In the following year Lapworth published a " Preliminary 

 Report on some Graptolites " forwarded to him by the 

 Canadian Survey from the Lower Palosozoic Rocks on the 

 south side of the St. Lawrence — from Cape Rosier to Tartigo 

 River, from the north shore of the Island of Orleans, one 

 mile above Cape Rouge, and from the Cove Fields, Quebec. 



He gives detailed lists of Graptolites from a large number 

 of Canadian localities, arranges them in stratigraphical order, 

 and correlates the containing beds with the graptolitc bearing 

 formations of America, Britain, and Europe. 



He recognises the existence in Canada of two main faunas, each divided into 

 two sub-faunas : 



(a) Quebec or Calciferous— -Chazy Fauna: 



Sub-fauna 1 . — Cape Rosier (and Barrasois River) Zone of Calciferous age= 



Tremadoc rocks and Dictyonema beds. 

 Sub-fauna 2. — St. Anne River Zone=Arenig. 



(b) Trentonian, Marsouin River (or Norman's Kill) fauna : 



Sub-fauna 1. — Camograptus zone of Griffin Cove and Marsouin River= 



Middle Llandeilo and Glenkiln. 

 Sub-fauna 2. — Cove Fields and Orleans Island Zone=Highest Llandeilo or 

 Lowest Caradoc. 



Tornquist, in a paper on the " Older Pala3ozoic Rocks of 

 Ostthuringia and Voigtland," classified and described their 

 Graptolite zones, and correlated them with those of Scandi- 

 navia and Britain. He recognises three main horizons : 

 (a) Lower Rastrites shales, (b) Upper Rastrites shales, and (c) 

 Retiolites shales. In an appendix to this paper he describes 

 and figures three new species : (1) Rastrites phleoides, (2) 

 Cyrtograptus radians, and (3) Retiolites macilentus. 



In 1888 a very important paper from the stratigraphical 

 aspect of graptolithic literature was published by Marr and 

 Nicholson. They divide the whole of the Stockdale Shales 

 of the Lake District into their component zones, the majority 

 of these being distinguished by special Graptolites. They 

 demonstrate the presence in the Stockdale Shales of the same Graptolite zones 



1887. 



Tornquist, 



" Anteckningar oni de 



aldre Paleozoiska leden 



i Ostthtiringen och 



Voigtland," ' Geol. 



Poren. Forh.' bd. ix, 



haft 7. 



1888. 



Marr & Nicholson, 



" The Stockdale 



Shales," ' Quart. Journ. 



Geol. Soc.,' vol. xliv. 



