﻿Carhonifemus Entomostraca from Nova Scotia. 317 



supplementary to it, I took advantage of tlie kindness 

 of Prof. Rupert Jones, F.R.S., the liighest authority in the 

 study 'of the PaUeozoic Entomostraca, to place in his 

 hands for determination the specimens which I had 

 collected. The material thus submitted to Prof. Jones, 

 between the years 1855 and 1(S84, was eventually 

 in the latter year published in a collected form 

 in a paper contributed by him to the London 

 Geological Magazijie, with a page of excellent illus- 

 trations, some of which are copied, by permission, in 

 the present note. A little later, in 1889, Prof. Jones 

 published in the same magazine an additional note on 

 specimens collected by Mr. Poord, F.G.S., in the coal- 

 formation at Mabou, Cape Breton, and which were 

 communicated to him by Mr. Whiteaves, F.Gr.S., Palaeon- 

 tologist to the Geological Survey of Canada. These, 

 however, added no new species to those previously known. 

 Still later, in one of his reports to the British Association, 

 he notices an example of Estheria Dawsoni, collected by 

 Mr. Fletcher of the Geological Survey, at Five Islands. 



The specimens described or noticed in the paper of 

 1884^ were partly from the Horton series of the Lower 

 Carboniferous, at Lower Horton, Horton Bluff and the 

 Strait of Canseau, and partly from the Middle Coal- 

 formation of Cumberland, Colchester, Pictou and Cape 

 Breton ; and in order to indicate their stratigraphical 

 positions, it may be best to take them here in the order of 

 time, as constituting two groups, one Lower Carboniferous 

 (Sub-Carboniferous of Dana, Tweedian and Calciferous 

 of Great Britain and Culm of the continent of Europe), 

 the other belonging to the time of the Middle or Produc- 

 tive Coal-Measures. 



Carboniferous Entomostraca fronx Nova Scotia, by T. Rupert .Jones and James 

 W. Kirkby, Geological Magazine, August, 188i. Some of the species had been separ- 

 ately mentioned or described in the same journal in 1870, 1878 and 1881. 



