204 ENDOSPOREAE [LYCOGALA 



grey tubes, 3 p. diam., or varying from 2 to 7 /a, faintly and 

 minutely wrinkled, with clavate or obtuse ends. Spores 

 yellowish-grey or ochraceous, minutely reticulated over 

 the greater part of the surface, 4 to 5 /a diam. — Fr. Syst. 

 Myc, iii. 82 ; Mass. Mon., 123 ; Macbr. in N. Am. Slime- 

 Moulds, 177 ; Petch in Ann. Perad., iv. 361. L. nitidum 

 Berk. & Br. in Journ. Linn. Soc, xiv. 81 (1873). L. atro- 

 purpureum Berk. & Br. I.e., 82. Dermodium conicum Rost. 

 Mon., p. 284 (1875). 



PI. 157. — a. aethalia ; b. part of cortex ; (1) outer membranous layer, bearing 

 on the surface irregularly shaped vesicles containing dark granular matter, and traversed 

 by empty flattened tubes having a somewhat parallel arrangement ; (2) homogeneous 

 inner layer, perforated by the narrow pseudo-capillitium tubes ; c. part of pseudo- 

 capillitium tube, and spores ; (Ohio). 



The aethalia in this species differ from those of L. epidendrum in 

 the uniformly small size and more or less conical shape, in the scanty 

 seldom branching somewhat parallel tubes of the thin outer layer 

 of the cortex, and in the almost simple tubes of the pseudo-capillitium. 

 Very similar structure is met with in minute thin-walled aethalia 

 of L. epidendrum, but such small aethalia are usually found in company 

 with others of more ordinary dimensions, and differ also in the shape 

 and arrangement of the superficial vesicles. 



Hab. On dead wood. — Switzerland (B.M. 2844) ; N. Germany (B.M. 

 2818); Ceylon (K. 1729); Japan (B.M. 2027); Santa Cruz, West 

 Indies (B.M. 2845) ; Philadelphia (B.M. 1546) ; Ohio (B.M. slide). 



L. rufo-cinnamomeum Mass., L. ochraceum Mass. and L. Torrendli 

 Bres. belong to the Hymenogastrineae, and not to the Mycetozoa ; L. 

 terrestre Fr. and L. minutum Sacc. and Paol. should probably be 

 referred to the same group of fimgi. 



Subcohort III.— C ALONE MINE AE. 



Sporangia simple ; capillitium always present, forming a 

 system of uniform threads ; spores yellow, red, or grey. 



Order I. — Trichiaceae. 

 Capillitium consisting of tubular threads that are either 

 free and are then called " elaters," or combined into an 

 elastic network ; thickenings in the form of spirals or rings. 



KEY TO THE GENERA OF TRICHIACEAE. 

 Capillitium abundant, consisting of free elaters with spiral 

 thickenings. (38) Trichia. 



Pig. 46.— Trichia affinis de^Bary. 



a. Group of sporangia. Twice natural size. 



b. Elater. Magnified 250 times. 



c. Spore. Magnified 400 times. 



Fig. 40. 



