152 
ENDOSPOREiB. 
[OUCADE LLA 
SPECIES EXCLUDED FROM THE GENUS. 
L. ccespitosa Peck. = Lindbladia Tuhulina Yv. 
L. Lindheimeri Berk. = Fuligo sej^tica Gmel. 
L. peri-eptam Berk. = Brefeldia maxima Rost. 
L. ruhiformis Berk. = Tubulina fragiformis Pers. 
L. spermoides Berk. & Guvt. = Lindbladia Tubulirui Fr. 
Genus 26.— ORCADELLA Wingate, in Proc. Acad. N. Sc. Phil. 
(1889), p. 280. Sporangia stipitate; sporangium-wall opaque, 
granular, except in the upper part, where it forms a mem- 
branous lid. 
123. Orcadella operculata Wing., I.e. (1889). Plasmodium? 
Total height 0*4 to 0*7 mm. Sporangia urn-shaped or subglobose, 
stipitate, erect, scattered, 0*1 to 0*2 mm. diam., nearly black, lid 
flattened, circular, dull yellow, shining ; sporangium -wall cartila- 
ginous, opaque from deposits of refuse matter ; lid membranous, 
beset with minute granules 0'5 to 1 jx diam. Stalk cylindrical, 
subulate, nearly black, filled with dark coarse refuse matter. 
Spores yellowish in mass, almost colourless and smooth, 8 to 11 
IX diam. — Mass., Mon., p. 49. 
Plate LVn., B. — d. sporangia, x 20 ; e. fragment of sporangium- wall and 
papillose Ud, with spores, x 280 ; /. spore, x 600 (United States). 
Hah. On dead wood.— Philadelphia (L:B.M.123). 
Order III. — Tubulinace^. Sporangia tubular, compacted, 
stalked or sessile ; sporangium- wall membranous, pale rufous, 
without granular deposits : spores minutely reticulated, 4 to 7 
diam. 
KEY TO THE GENERA OE TUBULINACEJE. 
Sporangia without tubular extensions. (27) Tubulina. 
Fig. 35. — Tuhulina fragiformis Pers. 
Cluster of sporangia. Magnified 2^ times. 
Fig. 35. 
Sporangium-wall with tubular extensions connecting it with a 
hollow pseudo -columella. (28) Siphoptychium. 
Fig. iQ.—Sij}hoj)tycJduin Casparyi Eost. 
a. Cluster of sporangia. Magnified 3 times. 
1). Upper part of two sporangia, their walls 
partially removed, showing the columella. 
Magnified 10 times. 
Fig. 86. 
