214 



RESEARCHES ON FUNGI 



Table I 



Coprinus lagopus. All Possible Pairings of Ten Monosporous 

 Mycelia derived from Ten Spores of a Single Fruit-body 



J^B ab Alf aS 



2 



8361kd79 10 



AB 



a 



b 



Ai 



aB 



Mycelia No. 2 and No. 6 were mated, as also were No. 1 and 

 No. 9 ; and thus both possible kinds of diploid mycelia, namely, 

 {AB)-{-{ab) and (^6)+(cfS) were obtained. A photograph of the 

 diploid mycehum {AB) + {ab) is shown in Eig. 117. 



Eight large (15-cm.) Petri dishes containing dung-agar were now 

 inoculated with mycelia at their centre : two with {AB), two with 

 {ab), two with {Ab), and two with {aB). After nine days the diameter 

 of the myceUa was 5-5-6-2 cm. These large haploid myceHa were 

 then inoculated at one point on their periphery by means of a tiny 

 mass (not much larger than a pin's head) of aerial hyphae taken from 

 near the periphery of another haploid or diploid mycelium grown on 

 dung-agar (Fig. 124). 



One of the large {AB) mycelia was inoculated with the haploid 

 {ab), and the other with the diploid {AB)-\-{ab). Similarly, {ab) 

 was inoculated with {AB) and with {AB)-\-{ab) ; {Ab) was* inocu- 

 lated with {aB) and with {Ab)+{aB); and, finally, {aB) was 



