﻿OCT. 
  19, 
  1922 
  proceedings: 
  WASHINGTON 
  ACADEMY 
  OF 
  SCIENCES 
  401 
  

  

  Salvinia 
  cyathifcrmis 
  Maxon, 
  sp. 
  nov 
  

  

  Plants 
  small, 
  1 
  to 
  1.5 
  cm. 
  long, 
  1 
  cm. 
  broad, 
  or 
  less; 
  stem 
  filiform 
  (about 
  

   0.3 
  mm. 
  thick), 
  bearing 
  a 
  few 
  deciduous 
  short 
  few-celled 
  hairs. 
  Submerged 
  

   radiciform 
  leaves 
  imperfect, 
  conceptacles 
  wanting. 
  Floating 
  leaves 
  few, 
  2 
  or 
  3 
  

   pairs 
  (the 
  nodes 
  3 
  or 
  4 
  mm. 
  apart), 
  petiolulate 
  (about 
  0.5 
  mm.), 
  olivaceous 
  

   above, 
  darker 
  beneath, 
  5 
  to 
  6 
  mm. 
  long, 
  subflabelliform, 
  cyathiform, 
  truncate- 
  

   subcordate 
  at 
  base, 
  broadly 
  rounded 
  in 
  the 
  apical 
  portion, 
  not 
  emarginate, 
  

   conduplicate 
  in 
  drying, 
  the 
  folded 
  blade 
  4 
  to 
  5 
  mm. 
  broad, 
  appearing 
  cunei- 
  

   form, 
  with 
  an 
  acutish 
  or 
  narrowly 
  roundish-cuneate 
  base; 
  midvein 
  slight, 
  

   subflexuous, 
  hardly 
  thicker 
  than 
  the 
  lateral 
  veins; 
  main 
  lateral 
  veins 
  6 
  or 
  7 
  

   pairs, 
  connected 
  in 
  oblong 
  areoles 
  oblique 
  from 
  the 
  midvein, 
  each 
  areole 
  

   subtending 
  two 
  narrowly 
  oblong 
  or 
  linear 
  areoles 
  toward 
  the 
  margins, 
  the 
  

   excurrent 
  veinlets 
  mostly 
  free, 
  occasionally 
  producing 
  a 
  minute 
  areole; 
  

   papillae 
  numerous 
  on 
  the 
  upper 
  side 
  in 
  a 
  wide 
  marginal 
  zone 
  1.5 
  to 
  2 
  mm. 
  

   broad, 
  linear, 
  about 
  1 
  mm. 
  long, 
  borne 
  mostly 
  upon 
  the 
  ultimate 
  cross-veins 
  

   and 
  between 
  the 
  excurrent 
  veinlets, 
  greenish-hyaline, 
  cleft 
  at 
  the 
  tip. 
  

  

  Type 
  in 
  the 
  U. 
  S. 
  National 
  Herbarium, 
  no. 
  1,058,520, 
  collected 
  from 
  a 
  pond 
  

   at 
  Cedros, 
  Trinidad, 
  December 
  20, 
  1914, 
  by 
  W. 
  E. 
  Broadway; 
  received 
  from 
  

   the 
  New 
  York 
  Botanical 
  Garden. 
  

  

  In 
  habit 
  and 
  in 
  form 
  and 
  venation 
  of 
  the 
  floating 
  leaves 
  5. 
  cyathiformis 
  

   resembles 
  5. 
  sprucei 
  Kuhn, 
  of 
  Brazil, 
  founded 
  on 
  Spruce 
  1G36. 
  That 
  species 
  

   as 
  described 
  and 
  figured 
  in 
  the 
  Flora 
  Brasiliensis, 
  and 
  as 
  known 
  to 
  the 
  writer 
  

   from 
  a 
  portion 
  of 
  the 
  type 
  collection 
  courteously 
  lent 
  from 
  Kew, 
  has 
  the 
  leaves 
  

   much 
  less 
  deeply 
  cup-shaped, 
  broadly 
  cuneate, 
  and 
  devoid 
  of 
  papillae 
  upon 
  

   the 
  upper 
  surface, 
  except 
  for 
  a 
  few 
  at 
  the 
  extreme 
  margin 
  that 
  are 
  so 
  minute 
  

   as 
  to 
  have 
  escaped 
  Kuhn's 
  attention. 
  The 
  leaf 
  substance 
  of 
  5. 
  sprucei 
  is 
  much 
  

   thinner 
  than 
  that 
  of 
  5. 
  cyathiformis, 
  and 
  the 
  venation 
  is 
  in 
  consequence 
  much 
  

   more 
  sharply 
  defined. 
  

  

  PROCEEDINGS 
  OF 
  THE 
  ACADEMY 
  AND 
  AFFILIATED 
  

  

  SOCIETIES 
  

  

  WASHINGTON 
  ACADEMY 
  OF 
  SCIENCES 
  

   162nd 
  meeting 
  

  

  The 
  162nd 
  meeting 
  of 
  the 
  Academy, 
  the 
  24th 
  annual 
  meeting, 
  was 
  held 
  

   at 
  the 
  Administration 
  Building 
  of 
  the 
  Carnegie 
  Institution 
  of 
  Washington, 
  

   on 
  Tuesday, 
  January 
  10, 
  1922. 
  The 
  meeting 
  was 
  called 
  to 
  order 
  by 
  Vice- 
  

   President 
  Humphreys. 
  Dr. 
  Alfred 
  H. 
  Brooks, 
  retiring 
  President 
  of 
  the 
  

   Academy, 
  delivered 
  an 
  address, 
  entitled. 
  The 
  scientist 
  in 
  the 
  Federal 
  service. 
  

   This 
  has 
  since 
  been 
  published 
  in 
  the 
  Journal 
  of 
  the 
  Academy 
  (12: 
  73-115. 
  

   Feb. 
  19, 
  1922). 
  

  

  Following 
  the 
  address 
  the 
  annual 
  business 
  meeting 
  was 
  held. 
  The 
  minutes 
  

   of 
  the 
  21st 
  annual 
  meeting 
  were 
  read 
  and 
  approved. 
  The 
  Corresponding 
  

   Secretary, 
  Robert 
  B. 
  Sosman, 
  reported 
  briefly 
  on 
  the 
  activities 
  of 
  the 
  Acad- 
  

   emy 
  during 
  the 
  year. 
  On 
  January 
  1, 
  1922, 
  the 
  membership 
  consisted 
  of 
  6 
  

   honorarj^ 
  members, 
  3 
  patrons, 
  and 
  534 
  members, 
  the 
  total 
  being 
  543, 
  of 
  whom 
  

   325 
  reside 
  in 
  or 
  near 
  the 
  District 
  of 
  Columbia. 
  Nine 
  resignations 
  were 
  

   accepted 
  diu-ing 
  the 
  year, 
  and 
  the 
  Academy 
  lost 
  by 
  death 
  the 
  following 
  

  

  