Carhoriifcroiis Entumostraca from Nova Scotia. 317 



suppleiiifiiitary to it, T took advuntiiji^e of the kindness 

 of l*rof. liupert Jones, F.U.S,, tlie liighest authority in the 

 study of tiie Pahi'ozoic Kntoniostrnca, to place in his 

 hands for determination the specimens wliich I had 

 collected. The material thus submitted to Prof. Jones, 

 between the years isr»5 and 1884, was eventually 

 in the latter year published in a collected form 

 in a paper contributed by him to the London 

 Geological Magazine, 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. Foord, F.G.S., in the coal- 

 formation at Mabou, Cape Breton, and which were 

 communicated to him by Mr. Whit^aves, F.G.S., Palteon- 

 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 Estherla Dawsoni, collected by 

 Mr. Fletcher of the (xeological 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 onler 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 Jiritain and Culm of the continent of Europe), 

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

 tive Coal-Measures. > : • 



Carboiiifuroiis Eiituniustraca from Nova Scotia, by T. Rupert Jotiea ami Jaiiius 

 W. Kirkby, Uuolngical Ma^iizine, August, 1884. Some of tlie species had been separ- 

 atfiy mentioned or described in the same Journal iu 1870, 1878 and 1881. 



