SYNOPSIS OF MYCETOZOA 195 



P 



drooping 

 Sporangia buff; wall evanescent above . A. flava Pers. 



Sporangia red ; wall persistent above in a few shield-like 

 fragments A (Erstedtii Eost. 



41. Lachnobolus Fries. Sporangia sessile or shortly stalked, 



clustered ; capillitiuin a loose network of closely warted 

 threads attached to many parts of the single-layered per- 

 sistent sporangium-wall. 



Sporangia globose, sessile, heaped .... L. circinans Fr. 



Sporangia globose or ellipsoid, clustered, shortly stalked 



L. oecidentale Macbr. (21, p. 188*) 



very closely allied to L. circinans. 



42. Perichsena Fries. Sporangia subglobose, sessile, rarely shortly 



stalked, or forming plasmodiocarps ; sporangium-wall of two 

 layers, the outer thickened with dark granules, which are 

 exceptionally absent in the upper part ; single in P. micro- 

 spora ; capillitium of slender branching tubular threads, 

 minutely warted, or spinose. 



A. Sporangium- wall stout, brown or grey, inner layer smooth : 



Capillitium spinose P. chrysosperma List. 



Capillitium minutely warted, abundant ; spores 10-11 /xdiam. 



P. depressa Lib. 



Capillitium minutely warted or nearly smooth, scanty ; spores 

 12-14 /x P. populina Fr. 



B. Sporangium-wall membranous : 



Sporangia globose or forming plasmodiocarps, yellow or pale 

 umber ; inner layer of wall papillose ; spores 10 /x 



Plasmodiocarps flesh-coloured ; spores 6 ft 



P. variabilis Eost. 



P. microspora Penz. & List. (24, p. 76). 



Order III. — Margaritacejs. 



43. Margarita List. Sporangia globose, with a translucent wall ; 



capillitium a profuse coil of slender hair-like scarcely branch- 

 ing threads M. metallica List. 



44. Dianema Rex. Sporangia sessile, or forming plasmodiocarps ; 



sporangium-w T all membranous or cartilaginous ; capillitium 

 consisting of nearly straight threads, slender at both ends, 

 attached above and below to the sporangium-wall. 



A. Sporangium-wall translucent, membranous ; spores free : 



Capillitium threads nearly simple, attached to the sporangium- 

 wall by short branches D. Harvey i Rex 



Plasmodiocarps ; capillitium threads converging to acuminate 

 points of attachment to the sporangium- wall 



D. depressum List- 



B. Plasmodiocarps ; the wall granular, cartilaginous ; spores 



clustered . D. eorticatum List. 



