77 



of the Fossil Fishes of the Devonian Kocks of Canada " are amongst 

 the most impox-tant contributions to Canadian Palaeontology ever pub- 

 lished. 



H.M.A. 



l^OTES ON THE PALAEOZOIC BlVALVED EnTOMOSTRACA. No. XXVII, On 



Some North American (Canadian) Species. By Prof. T. Rupert 



Jones, F.R.S., F.G.S. 



No. XYII of the Annals and Magazine of Natural History, for 

 May, 1889, pp. 373-387, contains an interesting contribution to the 

 "knowledge of some critical forms of Canadian Primitian and Beyrichian 

 Ostracoda, which were sent to Dr. Jones by Mr. "Whiteaves, of the Geo. 

 Geological Survey of Canada, for examination and study. The species 

 therein described, were collected : 1 . From the Lower Devonian of Camp- 

 bellton, New Brunswick, associated with Ooccosteics Acadi(ms (Whit- 

 ^aves) and Cephalaspis Campbelltonensis (Whiteaves), etc; 2. from the 

 Lower Helderberg (Ludlow) formation of Cape Bon Ami, New Bruns- 

 wick ; and 3. from St. Andrews, Manitoba. 



Devonian — From Campbellton Prof. Jones recognizes his Primitia 

 muiulula and several of its varieties, which have been heretofore de- 

 scribed in previous numbers of the " Annals, etc.," whilst he finds a 

 new species, viz. : Primitia scaphoides, which is compared to P. semicor- 

 data (Jones). 



Silurian — From the Lower Helderberg formation of Cape Bon 

 Ami the following forms are reeognized, viz.: Primitia mundula 

 (Jones), var.; P. aujualis (Jones and Holl), Young form. ; Beyrichia 

 Kloedeni (McCoy), var. Acadica, N. var. (Jones), along with Beyrichia 

 arcuata (Bean) and Isochilina labron, N. sp. 



Cambro- Silurian or Ordovician — The Manitoba specimen is de- 

 scribed by Dr. Jones under the name of Aparchites Whiteavesti, Apar- 

 chites being " a generic group separable from Primitia (though there 

 are some passage forms)." 



Two lithographic plates accompany the text. It would be a decided 

 advantage if the figures were magnified in all cases a uniform number 

 of diameters. There are besides these figures six woodcuts which are 

 very instructive. 



H. M. A. 



G 



