32 



BRITISH MVCETOZOA. 



[Cribraria. 



8. C. violaeea Rex. — Sporangium minute, about o"2 mm. diam., 

 dark violet, on a long stalk; the membranous cup violet-blue, one 

 to two-thirds the height of the sporangium ; net of delicate threads 

 connecting the broad, flat, angular nodes. Spores lilac, minutely 

 warted, 7 /x diam. 



Hab. On fir wood. 



Fig. 29. 



DlCTYDIUM UMBILICATUM 



Schrad. 



a. Group of sporangia. Twice 



natural size. 



b. Sporangium after the dis- 



persion of spores. Magni- 

 fied 20 times. 



Genus 21. DlCTYDIUM Schrad.— 

 Sporangium-wall with parallel ribs ex- 

 tending from the base to the apex, con- 

 nected by slender transverse threads. 



1. D. umbilicatum Schrad. — Sporangia 

 globose, becoming umbilicate above, dark 

 red-brown. Stalk bent or twisted at the 

 slender apex. Spores pale red-brown, 

 4 to 7 fx. diam., with two or three purple 

 plasmodic granules on the spore wall. 



Hob. On dead wood. 



ORDER II.— LICEACE^E. 



Genus 22. LICEA Schrad. — Sporangia 

 sessile. Sporangium-wall cartilaginous. 

 Capillitium wanting. 



1. L. flexuosa Pers. — Plasmodiocarps 

 elongate, dark brown. Spores pale olive- 

 brown, spinulose, sometimes in clusters 

 of six or eight, 11 to 14 /i diam. 



Hab. On dead wood. 



Fig. 30. 

 LlCEA FLEXUOSA PerS. 



. Group of plasmodiocarps. 



Twice natural size. 

 . Plasmodiocarp. Magnified 

 6 times. 

 Spores. Magnified 200 times. 



ORDER III.— TUBULINACEjE. 



Genus 23. TUBULINA Persoon. — Sporangia tubular, com- 

 pacted. Capillitium wanting. 



1. T. fragiformis Pers. — Sporangia 

 cylindrical, crowded on a spongy hypo- 

 thailus, forming a rounded honeycomb- 

 like rufous-brown mass. Spores pale 

 rufous-brown, reticulate, 5 to 8 jx diam. 



Hab. On dead wood. 



Fig. 3.. 



I CBULINA FRAGIFORMIS PeiS. 



Cluster of sporangia, 

 fied 2$ times. 



Magni- 



