128 HERRE 



7. ACAROSPORA HASSEI Herre, new species. 



Thallus effuse, of irregular, thick, sometimes lobate scales, thinly 

 scattered to contiguous and fissured-crustaceous; color a pale green- 

 clay to dusky yellowish and dirty brown; beneath pale yellowish to 

 brown; KOH -; CaCl 2 2 -. 



Apothecia numerous, one to several in a scale, small, impressed and 

 slightly concave, soon plane, without evident margin; disk reddish 

 to very dark red-brown; epithecium dark brown, granulose; para- 

 physes rather broad, straight or curved, their tips pale yellowish 

 brown; thecium blue with I; hypothecium pale yellowish, nearly 



i 1.25 



clear; spores - - /* 



3 -4-9 



On sandstone at Castle Rock, altitude 3000 feet. Reminding one 

 of Acarospora glaucocarpa, but quite different in appearance from 

 any Acarospora I have been able to examine. 



I take pleasure in naming this species for the veteran Calif ornian 

 lichenologist, Dr. H. E. Hasse. 



8. ACAROSPORA ARENOSA Herre, new species. 



Thallus thin, often scanty, of small, closely appressed, flat or very 

 slightly roughened scales; contiguous or marked by slight fissures; 

 dirty grayish or sand-colored; beneath sand-color or pale; KOH ; 

 CaCl 2 2 -. 



Apothecia numerous, small to very small, finally of medium size, 

 rarely more than one in an areole; at first flat, with a thin, erect, 

 entire, proper margin; soon slightly convex, the margin almost disap- 

 pearing and barely visible; color black or very dark reddish; para- 

 physes very pale brownish, becoming clear with KOH, agglutinate, 

 their tips brown; hypothecium more or less dusky; hymenium deep 



I 12^ 



blue with I; spores - ^ /*. 



2.5 - 3! 



On sandstone in the foothills a few miles from Stanford Univer- 

 sity, at an altitude of 400 feet. 



EPHEBACE.E. 



Thallus small but f ruticose, branched, more or less filiform or folia- 

 ceous, with Scytonema or Stigonema algae; cortex present or absent. 



