Professor T. Rupert Jones — N. American Ostracoda. 403 



The St. John Group in the Cambrian terrane of New Brunswick 

 is given in memoir No. 4, pp. 105 and 109, as follows : — 



Cambrian ... 

 Pue-Cambrian. 



Divisions. Bretonian ... Tetraffrapfus iauna,. 



,, 2. Jolianiiiau ... = place of the Olenus fauna. 



,, 1. Acadian ... Paradoxides and Protolenus fauna. 



The Ostracoda peculiar to the three divisions or zones of the 

 Etcheminian terrane underlying the St. John Group in Cape Breton, 

 and to the still lower Coldbrook terrane, are tabulated at pp. 438 

 and 439 in memoir No. 10. 



List of Genera and Species of Ostracoda from Lower Palaeozoic Strata, 

 DESCRIBED BY Dr. G. F. Matthew, 1886-1902. 



In the foregoing list there are enumerated 13 genera, comprising 

 43 species, with 1 variety and 15 mutations (changes or stages). 



1 Beyrichona ovata of the Protolenus -zone is referred to the genus Escasona at 

 p. 458 of memoir No. 10. 



* Primitia aurora and P. oculata are referred to the genus Bradoria at p. 452 of 

 memoir No. 10. 



2 Lepiditta and Lepidilla have Ksiris, a scale, for their root. 



* Another species of Aparchites {A. conchiformis) is referred to at p. 454 of 

 memoir No. 10 as belonging to the Protolenus-zone. 



5 Bradoria is derived from the Lake ' Bras d'or ' (!), in Cape Breton. 



® Scrutatrix is corrected from scrutator. So also perspectrix, spectatrix, and 

 observatrix are corrections. 



' Bradorona is regarded as the augmentative of Bradoria. 



^ Escasona seems to have been derived from Escasonie in Nova Scotia (see memoir 

 No. 4, pp. 444 and 445), or Cape Breton (ibid., pp. 454 and 456). We may note 

 that the genera Kirkbya and Kloedenia are referred to and misspelt here and there 

 in the text. 



