﻿NIAGARA 
  FALLS 
  AND 
  VICINITY 
  2^1 
  - 
  

  

  paddles 
  — 
  large 
  or 
  last 
  pair 
  of 
  thoracic 
  legs 
  of 
  the 
  eurypterids 
  

   pallial 
  line— 
  line 
  on 
  the 
  interior 
  of 
  the 
  shell 
  of 
  mollusks 
  marking 
  the 
  at- 
  

   tachment 
  of 
  the 
  mantle 
  

   pallial 
  sinus 
  — 
  reentrant 
  angle 
  in 
  the 
  pallial 
  line 
  usually 
  at 
  the 
  posterior 
  end 
  

  

  of 
  the 
  shell 
  of 
  pelecypods; 
  it 
  marks 
  the 
  attachment 
  of 
  the 
  siphon 
  

  

  muscles 
  

   palmars 
  — 
  third 
  series 
  of 
  brachial 
  plates 
  of 
  the 
  Crinoidea, 
  lying 
  above 
  the 
  

  

  axillary 
  distichals 
  

   palmate^palm-shaped 
  

   palpebral 
  lobes 
  — 
  supra-orbital 
  extensions 
  from 
  the 
  fixed 
  cheeks 
  of 
  trilo- 
  

  

  bites 
  

   papilla 
  — 
  a 
  small 
  nipple-shaped 
  protuberance 
  

   papillose 
  — 
  covered 
  v^ith 
  papillae 
  or 
  fine 
  projections 
  

   parabasals 
  — 
  second 
  cycle 
  of 
  basal 
  plates 
  in 
  crinoids 
  

   pectinated 
  rhombs 
  — 
  paired 
  pore 
  clusters 
  in 
  the 
  calyx 
  of 
  certain 
  cystoids 
  

  

  (Callocystites) 
  

   pedicle 
  — 
  fleshy 
  peduncle 
  or 
  stem 
  used 
  for 
  attachment 
  in 
  the 
  brachiopoda 
  

   pedicle 
  valve 
  — 
  valve 
  which 
  gives 
  emission 
  to 
  the 
  pedicle 
  in 
  the 
  brachiopoda. 
  

  

  Ventral 
  of 
  most 
  authors. 
  Usually 
  the 
  larger 
  valve 
  

   pentameroid 
  — 
  five 
  chambered, 
  similar 
  to 
  Pentamerus 
  

   pentapetalous 
  — 
  resembling 
  a 
  five-petaled 
  flower 
  

   penultimate 
  — 
  next 
  to 
  the 
  last 
  

  

  periderm 
  — 
  outer 
  chitinous 
  covering 
  of 
  Hydrozoa 
  

   periostracum 
  — 
  epidermis 
  or 
  outer 
  organic 
  coating 
  of 
  shells 
  

   peripheral 
  — 
  pertaining 
  to 
  the 
  circumference 
  

   peristome 
  — 
  margin 
  of 
  an 
  aperture, 
  i. 
  e. 
  the 
  mouth 
  of 
  a 
  univalve 
  molluscan 
  

  

  shell, 
  the 
  mouth 
  of 
  a 
  bryozoan 
  cell, 
  etc. 
  

   peritheca 
  — 
  epithecal 
  covering 
  which 
  surrounds 
  a 
  colony 
  of 
  corallites, 
  i. 
  e. 
  a 
  

  

  compound 
  corallum 
  

   petaloid 
  — 
  resembling 
  a 
  leaf 
  or 
  petal 
  

   pinnate— 
  shaped 
  like 
  a 
  feather 
  

   pinnulate 
  — 
  provided 
  with 
  pinnules 
  

   pinnules 
  — 
  finest 
  divisions 
  of 
  the 
  arms 
  of 
  crinoids 
  

   plano-convex 
  — 
  normally 
  in 
  brachiopods, 
  with 
  the 
  pedicle 
  valve 
  convex 
  and 
  

  

  the 
  brachial 
  valve 
  flat 
  

   pleura 
  — 
  lateral 
  portions 
  of 
  the 
  thoracic 
  rings 
  of 
  trilobites 
  

   plicate 
  — 
  plaited 
  or 
  folded 
  

  

  plications 
  — 
  folds 
  or 
  rib-like 
  plaits 
  of 
  a 
  brachiopod 
  shell 
  

   polyp 
  — 
  animal 
  of 
  a 
  simple 
  coelenterate 
  or 
  bryozoan 
  

   polypite 
  — 
  individual 
  polyp 
  of 
  a 
  colony 
  

   pore-rhombs 
  — 
  pore 
  clusters, 
  arranged 
  in 
  rhombic 
  manner 
  in 
  the 
  calyx 
  of 
  

  

  cystoids 
  

   poriferous 
  — 
  pore-bearing, 
  corals 
  which 
  like 
  Favosites 
  are 
  furnished 
  with 
  

  

  several 
  pores 
  

   posterior 
  — 
  situated 
  behind 
  

  

  