Diatoms of Nova Scotia: Collected by Alexander Howard 

 MacKay, and determined, distributed and lists published 

 by J. Tempere and H. and M. Peragallo, Paris, France, 

 1907-1915.— By A. H. MacKay. LL.D.. F.R.S.C. 



(Read by title, 26 May. 1922) 



These diatomaceous deposits were collected about thirty- 

 five years ago by me. when Principal of the Pictou Academy. 

 The species were named and distributed in Prepared Micro- 

 scopic Slides by Tempere and Peragallo, and the lists were 

 published in the second edition of "Diatom^es du Monde Entier" 

 published from 1907 to 1915 in 30 "Fascicules" of 16 pages 

 each, descriptive of 1000 microscopic slides of diatomaceous 

 deposits from all parts of the world. The genera and species 

 are arranged alphabetically for the convenience of future refer- 

 ence to the nomenclature. 



(The number in brackets indic?.tes the Serial No. of the slide of the set of 1000 con- 

 taining a sample of material from the locality named.) 



LIST OF SPECIES. 

 Achnanthidium flexellum Br6b. GrantLake, Pictou Co. (374). 



Amphora libyca Ehr. var. ? Grant Lake (374); Maclean Pond, 



Pictou Co. (394) and Earltown Lake, Colchester Co. 



(605). 

 lineata, var. euglypta. Earltown Lake. Colchester Co., 



(605). 

 ooalis Ktz. Maclean Pond, Pictou Co. (394). 

 ocalis Ktz. forma minor. High Pond (372); Swamp 



Pond (373), Pictou. 



Cocconeis lineata Ehr. Maclean Pond, Pictou Co. (394); 



Drakesville (679). 

 placentula Ehr. Swamp Pond (373); Grant Lake (374); 

 Drakesville (679). 



Cyclotella Chareioni H. & M. P. Musquodoboit Lake, Halifax 

 Co. (879). 

 comta Ktz. High Pond. Pictou Co. (372). 



(175) 



