﻿152 
  Forty- 
  seventh 
  Report 
  on 
  the 
  State 
  Museum. 
  

  

  Zygodesmus 
  tenuissimus 
  n. 
  sp. 
  

  

  Effused, 
  pulverulent, 
  very 
  thin, 
  yellowish-gray 
  or 
  subcinereous, 
  

   the 
  concolorous 
  margin 
  indefinite; 
  the 
  hypha3 
  short, 
  septate, 
  

   equalling 
  or 
  exceeding 
  the 
  spore 
  in 
  diameter 
  ; 
  spores 
  globose, 
  

   spinulose, 
  slightly 
  colored, 
  .0003 
  in. 
  broad. 
  

  

  Decayed 
  wood. 
  Canada. 
  September. 
  Macoun. 
  

  

  The 
  species 
  appears 
  to 
  be 
  related 
  to 
  Z. 
  marginalus 
  from 
  which 
  

   it 
  is 
  separable 
  by 
  its 
  thin 
  pulverulent 
  character, 
  short 
  hyphae 
  and 
  

   concolorous 
  indefinite 
  margin. 
  

  

  Asterula 
  Tracyi 
  n. 
  sp. 
  

  

  Subiculum 
  thin, 
  hypophyllous, 
  composed 
  of 
  slender 
  flexuous 
  

   septate 
  colored 
  filaments 
  about 
  .00016 
  in. 
  thick; 
  perithecia 
  

   very 
  minute, 
  .004 
  to 
  .005 
  in. 
  broad, 
  hemispherical 
  or 
  depressed, 
  

   subastomous, 
  black; 
  asci 
  oblong-clavate, 
  .0011 
  to 
  .0014 
  in. 
  long, 
  

   .0003 
  to 
  .0004 
  broad; 
  spores 
  oblong, 
  slightly 
  narrowed 
  toward 
  

   one 
  end, 
  obscurely 
  2-to 
  4-nucleate, 
  colorless, 
  .0003 
  to 
  .0004 
  in. 
  

   long, 
  .00012 
  to 
  00015 
  broad. 
  

  

  Living 
  or 
  languishing 
  leaves 
  of 
  Spermacoce 
  jparviflora. 
  Biloxi, 
  

   Miss. 
  August. 
  Number 
  1842. 
  Tracy. 
  

  

  Melogramma 
  effusum 
  n. 
  sp. 
  

  

  Stroma 
  effused, 
  thin, 
  superficial, 
  black; 
  perithecia 
  minute, 
  

   carbonaceous, 
  crowded, 
  convex, 
  opaque, 
  black, 
  white 
  within 
  ; 
  

   asci 
  subcylindrical 
  ; 
  spores 
  subfusiform, 
  generally 
  slightly 
  

   curved, 
  colorless, 
  triseptate, 
  .0008 
  to 
  .0011 
  in. 
  long, 
  .00016 
  to 
  

   .0002 
  broad, 
  the 
  second 
  cell 
  usually 
  swollen. 
  

  

  Decayed 
  wood. 
  Canada. 
  Macoun. 
  

  

  This 
  species 
  does 
  not 
  harmonize 
  well 
  with 
  the 
  character 
  of 
  the 
  

   genus 
  to 
  which 
  it 
  is 
  here 
  referred, 
  for 
  the 
  spores 
  in 
  this 
  genus 
  are 
  

   typically 
  colored. 
  The 
  colorless 
  spores 
  indicate 
  relationship 
  to 
  • 
  

   the 
  genus 
  Zignoella, 
  but 
  the 
  presence 
  of 
  a 
  stroma, 
  which 
  with 
  the 
  

   perithecia 
  forms 
  a 
  thin 
  rugose 
  carbonaceous 
  crust, 
  shows 
  its 
  

   relationship 
  to 
  the 
  genus 
  Melogramma 
  and 
  forbids 
  its 
  reference 
  

   to 
  Zignoella. 
  

  

  Stereum 
  balsameum 
  Pk. 
  form 
  reflexum. 
  

  

  Pileus 
  coriaceous, 
  firm 
  when 
  dry, 
  villose-tomentose, 
  obscurely 
  

   zonate 
  ; 
  hymenium 
  stnoky-purplish, 
  changing 
  to 
  red 
  where 
  

   wounded. 
  

  

  Canada. 
  Macoun. 
  

  

  