68 A Monograph of the Myxogastres. 



March., 164; Rab., Fung. Eur., 2519; Jack, Leiner. &c., 422 ; 

 Rav., Fung. Car., 78 ; Rav., Fung. Amer., 476 ; Ellis, N. Amer. 

 Fung., 1122. 



On decaying wood, especially pine. Britain (Milton, Norths ; 

 Kew, Suffolk, Scarboro', Carlisle, Appin, N. B.) ; Germany ; 

 Sweden; Finland; Belgium; Denmark; Hungary; United 

 States ; S. America ; Ceylon. 



Gregarious, 1 1'5 mm. high; the stem varies from 2 3 

 times as long as the sporangium; the lower three-fourths is 

 erect, blackish-brown, and opaque ; at the top of this erect 

 portion there is a sharp curve, above which the pendulous 

 portion of the stem consists, at maturity, of a colourless, 

 shrivelled membrane, from which the sporangium hangs sus- 

 pended, and easily moved by wind or insects ; in all probability 

 this peculiar structure of the stem is connected with spore- 

 dissemination. The inner (surface of the calyculus and the 

 ribs are furnished with numerous dark brown granular masses 

 of organic matter. 



(Rostafinski's Synonyms.) 



Mucor canccllatus, Batsch, f. 232 (1789). 



Stcmonitis cancellata, Gmel., Syst., 1468 (1791). 



Sfthaerocarpus trichioidcs, Bull., p. 124 (1791). 



Cribraria cernua, Pers., Obs., i. 91 (1796). 



Dictydium, umbilicatum, Schrad., t. iv., f. 1 (1797); Fr., S. M., 



iii. 165; Berk., Eng. Fl., v. p. 318; Cooke, Hdbk., 1165, 



fig. 134. 



Dictydium airibigvwm, Schrad., t. iv., f. 2 (1797). 

 Trichia cernua, Poir., Ency., viii., no. 25 (1808). 

 Dictydium ccrnuum, Nees., f. 117 (1816). 

 Dictydium trichioidcs, Chev., Fl. Par., 327 (1827) ; Corda Ic., 



v., f. 36. 



Dictydium venosum, Schrad. 



Sporangium globose, cernuous, brownish-yellow owing to 

 the spore-mass showing through the translucent wall, which is 



