162 



ENDOSPORE^. 



[OECADE L] 



SPECIES EXCLUDED PBOM THE GENUS. 



L. ccespitosa Peck. = Lindhladia Tubulina Fr. 



L. Lindheimeri Berk. = Fuligo septica Gmel. 



L. perreptans Berk. = Brefeldia maxima Eost. 



L. rubiformis Berk. = Tubulina fragiformis Pers. 



L. spermoides Berk. &, Curt. = Lindhladia Tubulina Pr. 



Genus 26.— ORCADELLA Wingate, in Proc. Acad. N. So. Phi 

 (1889), p. 280. Sporangia stipitate; sporangium-wall opaqu 

 gramilar, except in the upper part, where it forms a met 

 branous lid. 



123. Orcadella opereulata Wing., I.e. (1889). Plasmodiun 

 Total height 0-4 to 0-7 mm. Sporangia urn-shaped or subglobos 

 stipitate, erect, scattered, 0-1 to 0-2 mm. diam., nearly black, 1 

 flattened, circular, dull yellow, shining ; sporangium- wall cartil 

 ginous, opaque from deposits of refuse matter ; lid membranou 

 beset with miuute granules 0-5 to 1 /a diam. Stalk cylindrics 

 subulate, nearly black, filled with dark coarse refuse matte 

 Spores yellowish in mass, almost colourless and smooth, 8 to ] 

 fx diam. — Mass., Mon., p. 49. 



Plate LVII., B. — d. sporangia, x 20 ; e. fragment of sporangium-wall ai 

 papillose lid, with spores, x 280 ; /. spore, x 600 (United States). 



Hab. On dead wood.— Philadelphia (L:B.M.123). 



Order III. — Tubulinace^. Sporangia tubular, compacts 

 stalked or sessile ; sporangium-wall membranous, pale rufou 

 without granular deposits : spores minutely reticulated, 4 to 7 

 diam. 



KEY TO THE GENERA OF TUBULIN AGEM. 



Sporangia without tubular extensions. (27) Tubulin 



Fig. Zo.^Tubulina fragiformis Pers. 

 Cluster of sporangia. Magnified 2J times. 



Fig. 35. 



Sporangium-wall with tubular extensions connecting it with 

 hollow pseudo-columella. (28) Siphoptychiu 



Fig. 36.—8iphoj>tyohium Caspm-yi Kost. 

 a. Cluster of sporangia. Magnified 3 times. 

 J. Upper part of two sporangia, their walls 



partially removed, showing the columella. 



Magnified 10 times. 



