﻿PAGE. 
  

  

  Pedicellina 
  Americana 
  . 
  34 
  

  

  Fennel 
  Cholmondeley 
  .... 
  tj 
  

  

  Peristome 
  39 
  

  

  Pericardial 
  space 
  ilj 
  13 
  

  

  Pinnotheres 
  ostreum. 
  ... 
  24 
  

  

  Poll 
  12, 
  76 
  

  

  Polyps 
  51 
  

  

  Potomac 
  River 
  ( 
  ).. 
  . 
  3 
  

  

  Premiums 
  for 
  ripe 
  shad 
  xlvii 
  

  

  Probatocephalus 
  32 
  

  

  Proposed 
  new 
  methods 
  of 
  

   caring 
  for 
  artificially 
  im- 
  

   pregnated 
  eggs 
  54 
  

  

  Propositions 
  laid 
  down 
  by 
  

  

  Miibius 
  31 
  

  

  Puysegur, 
  M. 
  of 
  .Sissable 
  21 
  

  

  Pycnogonids 
  34 
  

  

  R 
  

  

  Removal 
  of 
  barges 
  to 
  Wat- 
  

   son's 
  Island 
  .x.xiv 
  

  

  Renaud, 
  J 
  ' 
  79 
  

  

  Reproductive 
  organs 
  dur- 
  

   ing 
  spawning 
  season 
  . 
  18 
  

  

  Respiration, 
  or 
  aeration 
  of 
  

  

  the 
  blood 
  10 
  

  

  Ryder, 
  Prof. 
  J. 
  A 
  . 
  . 
  . 
  x 
  

  

  S 
  

  

  Salensky 
  5, 
  78, 
  90 
  

  

  Salmo 
  Fontinalis 
  . 
  . 
  . 
  lxiii 
  

  

  Salmo 
  saJar 
  lux 
  

  

  " 
  " 
  eggs 
  from 
  

  

  the 
  U. 
  S. 
  CoMi'r 
  ... 
  li 
  11 
  

  

  Sauerhoff, 
  W. 
  P 
  . 
  . 
  . 
  . 
  44 
  

  

  Saunders, 
  J 
  no. 
  S 
  . 
  . 
  . 
  . 
  xxiv 
  

  

  " 
  "Journal 
  of 
  xxvi 
  

  

  " 
  " 
  Letter 
  " 
  xxv 
  

  

  Say, 
  Mr 
  24 
  

  

  Schleswig 
  Holstein 
  ... 
  26 
  

  

  Shad 
  XV 
  1 
  1 
  

  

  Shad 
  success 
  on 
  the 
  Poto- 
  

   mac 
  XV 
  I 
  I 
  I 
  

  

  Shell, 
  changes 
  during 
  

  

  growth 
  of 
  the 
  .... 
  63 
  

  

  Shell, 
  mechanism 
  of 
  the 
  7 
  

  

  Shell, 
  structure 
  of 
  the 
  . 
  8 
  

  

  Slipper 
  limpets 
  37 
  

  

  Spat, 
  numder 
  of 
  which 
  fix 
  

  

  themselves 
  to 
  a 
  single 
  

  

  slate 
  62 
  

  

  Spat, 
  Rate 
  of 
  growth 
  of 
  . 
  60 
  

  

  Sponges 
  21, 
  37 
  

  

  PAGE. 
  

  

  Stentor 
  cocruleus 
  . 
  . 
  39, 
  40 
  

  

  " 
  roeselle 
  .... 
  39 
  

   St. 
  Jerome's 
  Creek 
  (cix), 
  

  

  3,26,30,35,38,47,53,60, 
  63 
  

   "Strike" 
  of 
  the 
  fishermen 
  xLviii 
  

  

  Structure 
  of 
  heart 
  ... 
  12 
  

  

  Systemic 
  heart 
  ..... 
  '12 
  

  

  T 
  

  

  Table 
  of 
  catch 
  of 
  shad 
  for 
  

  

  II 
  years 
  iv 
  

  

  Table 
  of 
  amount 
  of 
  fish 
  

   sold 
  at 
  Washington 
  and 
  

   Alexandria 
  .... 
  y 
  

  

  Table 
  of 
  temperature 
  ob- 
  

   servations, 
  Washington 
  xx 
  

  

  Table 
  of 
  shad 
  hatching 
  op- 
  

   erations, 
  Washington 
  . 
  xxi 
  

  

  Table 
  of 
  temperature 
  ob- 
  

   servations 
  at 
  H. 
  de 
  G 
  . 
  xxxvii 
  i 
  

  

  Table 
  of 
  hatching 
  opera- 
  

   tions 
  at 
  H. 
  de 
  G 
  . 
  . 
  . 
  xL 
  

  

  Table 
  of 
  distribution 
  of 
  

  

  shad- 
  xLiii 
  

  

  Table 
  of 
  distribution 
  of 
  

  

  Penobscot 
  salmon 
  . 
  liv 
  

  

  Table 
  of 
  distribution 
  of 
  L. 
  

  

  L. 
  .salmon 
  lv 
  

  

  Table 
  of 
  salmon 
  hatching 
  

  

  operations 
  Lviii 
  

  

  Table 
  of 
  distribution 
  of 
  

  

  California 
  salmon 
  . 
  . 
  . 
  lxii 
  

  

  Table 
  of 
  distribution 
  of 
  

  

  trout 
  Lxiv 
  

  

  Table 
  of 
  distribution 
  of 
  

  

  carp 
  L.xxiv 
  

  

  Table 
  of 
  catch 
  of 
  oysters 
  

  

  1879— 
  1880 
  CXI 
  I 
  

  

  Table 
  of 
  maximum 
  and 
  

  

  minimum 
  temperature 
  74 
  

  

  Tolle 
  A 
  78 
  

  

  Tunicates 
  :^,4 
  

  

  Turrell, 
  L 
  79 
  

  

  U 
  

  

  Urosalpinx 
  36 
  

  

  U.S. 
  Coast 
  and 
  Geodetic 
  

  

  Sujvey 
  67 
  

  

  U. 
  S. 
  Fish 
  Commission 
  . 
  24 
  

  

  Unio 
  5, 
  12 
  

  

  V 
  

   Valves, 
  difference 
  in 
  shape 
  

  

  of 
  64 
  

  

  