2 THE AMERICAN MONTHLY [Jan 



forms ; c is a schematic representation of a fertile branch; 

 d is a primary sterigmata ; e is a secondary one ; f is a 

 spore and g are columella. 



Aspergillus repens. — This mould grows much like the 

 Penicillium and Mucor shown in "The Microscope" for 

 September last. The mycelium is like that of Penicil- 

 lium. The spore head is quite different (h). Primarily 

 the fertile branch of Aspergillus is single-celled, non-sep- 

 tate, while those of Penicillium are septate. The apex 

 of the fertile branch is swollen, club-like, from which 

 swollen end called columella (12to 36 microns in diameter) 

 the spores, k, are borne from single, riask-shaped bodies 

 marked d in the cut and called sterigmas. The spores 

 are 6 to 8 microns, slightly roughened, at first yellowish, 

 later greenish to gray. In later cultures small yellowish 

 bodies are found scattered in the superficial mycelium. 

 These are a second sort of fruit-bearing body and contain 

 spores 4 to 6 microns in diameter. They are somewhat 

 lens-shaped and have serrate margins, k. The yellow 

 perithecium is shown at m. 



This mould grows scantily upon various media. Upon 

 blood serum it does not grow at all. Milk is made alka- 

 line by it, does not coagulate, becomes thick and stringy 

 and shows the presence of albumoses. 



If a solution has developed in it a mould, it is not ad- 

 visable to filter the solution and return it to stock for the 

 active ingredients have probably undergone some changes. 

 Throw it away. 



Labrador and Anticosti.— By Rev. V. A. Huard, A. M., 

 Chicoutimi, Quebec. Paper, 8 vo. pp. 505, map and illus- 

 trations. Price $1.70 post paid. 



The author of this charming narrative is president of a 

 seminary and editor of a scientific magazine at Chicoutimi 

 in the province of Quebec. The book is in the French 

 language and makes delightful reading for the student. 



