66 



MYXOMYCETES. 



FRAGILIS. 



lateritia. 



Decaisneana. 



TRICHIA. 



A. Bigyrae. 



Elaters cylindrical, with two spirals, sepa- 

 rated by a space 3 or 4 times their diameter. VARIA. 



B. Polygyrae. 



Elaters cylindrical or fusiform, with more 

 than two spirals. 



I. Elaters fusiform, sporangium stipitate. 

 f Sporangium, together with the stem, 



forming only a common hollow. . FALLAX. 

 j-f Hollow of the sporangium divided 



from the hollow of the stem by a 



proper membrane. 



Elaters '00415 mm. broad, with 

 three spirals. .... 



Elaters '005 mm. broad, with four 

 spirals, which are widened and 

 flattened ..... 



II. Elaters cylindrical, 

 t Sporangium stipitate 



Sporangium sessile. 



* Spores smooth or warted. 



Elaters -0042 mm. broad, with 

 from four spirals covered with 

 spines ..... 

 Elaters -0033 mm. broad, with from 

 four spirals, smooth, terminating 

 in a smooth end, twice as long 

 as the diameter of the elater. 

 Elaters '0025--0033 mm. broad, 

 with inconspicuous swellings near 

 the end, terminating in a thin, 

 smooth, sharp-pointed spine. Spi- 

 rals from 2 to 4, scarcely to be 

 distinguished. .... contorta. 

 ** Spores provided with a thickened 

 band. 



1 Neighbouring spirals united 

 into a band, by thin veins 

 running parallel to the walls 

 of the elater 

 ! ! Spirals not thus united. 



Spirals from 3 to 5. Elaters 



00415-*005 mm. broad. . affinis. 

 Spiral from 3 to 4, covered 

 with numerous spines. Ela- 

 ters -00415 mm. broad. JacTcii. 



scabra. 



inconspicua. 



CHRYSOSPERMA, 



