266 THE NORTH AMERICAN SLIME-MOULDS 



except in the structure of the capillitium. The color is rather ochra- 

 ceous, dirty yellow, and the stipe is proportionally longer and darker, 

 but the form of the net is positive and gives to the species a de- 

 cidedly striking and unique appearance, so that it may be recognized 

 by the naked eye. It looks like an arcyria and for this reason Profes- 

 sor Morgan said //. plumosa. Lister regards it as the same as our 

 number 8. 



Common. Ohio, Illinois, Missouri, Iowa, and west; south to Mex- 

 ico. 



10. Hemitrichia MONTANA Morgan. 



Sporangia scattered or gregarious more or less closely, globose, 

 whitish, sessile or very short stipitate; the peridium opaque, dull 

 white, persistent below; capillitium deep yellow, the threads abun- 

 dantly branched, forming a compact network, 7 fi wide, bearing spirals 

 five or six, uneven and irregular, or anon interrupted, conspicuously 

 spinulose or warted, free tips not lacking, generally inflated ; spore- 

 mass yellow, spores by transmitted light pale, nearly colorless, dis- 

 tinctly warted, 10 ^i. 



Recognizable by its peculiar pallid, sessile sporangia, as by the in- 

 ternal structure. Perhaps related to Herniarcyria bucknalli Mass. 

 Our specimens are from Mr. Morgan, of Ohio, with the statement 

 that they were collected in the San Bernardino Mountains, Califor- 

 nia, by Mr. S. B. Parrish ; collected later from Monterey south. 



Common throughout south-western states to lower California. 



2. Calonema Morgan. 



1893. Calonema Morgan, Jour. Cin. Sac, p. 33. 



Sporangia sub-globose, crowded or superimposed, irregular sessile ; 

 hypothallus none; capillitium of slender tubules, arising from the 

 sporangium base, branched, marked with branching veins in an ir- 

 regular reticulation, and terminating in free extremities. Spores 

 yellow. 



1. Calonema aureum Morgan. 



Plate XIIL, Figs. 2, 2 a, 2 b, 2 c. 

 1893. Calonema aureum Morgan, /. c. 



