﻿NIAGARA 
  FALLS 
  AND 
  VICINITY 
  273, 
  

  

  saddles 
  — 
  forward 
  bending 
  portions 
  of 
  the 
  suture 
  in 
  the 
  shells 
  of 
  cephalopods 
  

  

  salient 
  — 
  standing 
  out 
  prominently 
  

  

  scabrous 
  — 
  rough 
  or 
  harsh 
  with 
  little 
  projecting 
  points 
  

  

  scalae 
  — 
  small 
  transverse 
  plates 
  in 
  the 
  genus 
  Unitrypa 
  of 
  the 
  bryozoa 
  

  

  scalariform 
  — 
  stair 
  or 
  ladder-shaped 
  

  

  sclerenchyma 
  — 
  calcareous 
  tissue 
  deposited 
  by 
  the 
  coral 
  polyps 
  

  

  scorpioid 
  — 
  scorpion-like, 
  coiled 
  like 
  the 
  tail 
  of 
  a 
  scorpion 
  

  

  semilunar 
  — 
  crescentic, 
  or 
  resembling 
  a 
  half 
  moon 
  

  

  semiovate 
  — 
  half 
  egg-shaped 
  

  

  senile 
  — 
  pertaining 
  to 
  old 
  age 
  

  

  septal 
  radii 
  — 
  radiating 
  ridges 
  taking 
  the 
  place 
  of 
  septa 
  in 
  certain 
  corals 
  

  

  septate 
  — 
  with 
  partitions 
  or 
  septa 
  

  

  septum 
  — 
  partition; 
  in 
  corals, 
  the 
  radiating 
  calcareous 
  plates; 
  in 
  cephalopods^ 
  

  

  the 
  transverse 
  partitions 
  between 
  the 
  chambers 
  

   serrate 
  — 
  notched 
  like 
  a 
  saw 
  

   setiferous 
  — 
  bristle-bearing 
  

  

  sigmoid 
  — 
  curved 
  like 
  the 
  Greek 
  letter 
  I 
  (sigma) 
  

   sinistral 
  — 
  left 
  handed, 
  reversed 
  coiling 
  of 
  some 
  gastropod 
  shells 
  

   sinuate 
  — 
  wavy, 
  winding 
  

  

  sinuosity 
  — 
  notch 
  or 
  incision 
  forming 
  a 
  wavy 
  outline 
  

   sinus 
  — 
  impression 
  in 
  the 
  surface 
  or 
  margin 
  of 
  a 
  shell 
  

  

  siphonal 
  funnel 
  — 
  siphonal 
  projection 
  from 
  the 
  septum 
  of 
  a 
  cephalopod 
  shell' 
  

   siphonal 
  lobe 
  — 
  lobe 
  in 
  the 
  suture 
  of 
  an 
  ammonoid 
  shell, 
  corresponding 
  in 
  

  

  position 
  to 
  the 
  siphuncle 
  

   siphuncle 
  — 
  tubular 
  canal 
  passing 
  through 
  the 
  air 
  chambers 
  in 
  the 
  shells 
  of 
  

  

  cephalopods 
  

   slickensides 
  — 
  polished 
  or 
  striated 
  surfaces 
  on 
  rock 
  due 
  to 
  motion 
  under 
  

  

  great 
  pressure 
  

   sockets 
  — 
  hollows 
  in 
  the 
  brachial 
  valve 
  of 
  brachiopods 
  for 
  the 
  recep.ion 
  of 
  

  

  the 
  teeth 
  of 
  the 
  opposite 
  valve 
  

   spatulate 
  — 
  shaped 
  like 
  a 
  spatula; 
  spoon-shaped 
  

   spheroidal 
  — 
  globose, 
  of 
  the 
  form 
  of 
  a 
  spheroid 
  

   spiniform 
  — 
  spine-like 
  

   spinulose 
  — 
  spine 
  bearing 
  

  

  spondylium 
  — 
  spoon-shaped 
  cavity 
  under 
  the 
  beak 
  of 
  pentameroid 
  brachio- 
  

   pods 
  

   squamous 
  — 
  scaly, 
  covered 
  with 
  scales 
  

   stalk 
  — 
  stem 
  of 
  crinoids 
  

  

  stellate 
  — 
  star-sliaped; 
  arranged 
  in 
  star-like 
  manner 
  

   stipe 
  — 
  stalk 
  or 
  stem 
  in 
  plants 
  

   stock 
  — 
  main 
  stem 
  or 
  trunk 
  

   striae 
  — 
  fine 
  radiating 
  surface 
  lines 
  of 
  shells 
  

   stylolites 
  — 
  peculiar 
  columnar 
  and 
  striated 
  rock 
  form 
  seen 
  in 
  limestones 
  at 
  

  

  the 
  junction 
  of 
  two 
  layers 
  

   sub 
  — 
  in 
  composition 
  indicates 
  a 
  low 
  degree: 
  sub-angular 
  — 
  rather 
  angular; 
  

  

  sub-carinate 
  — 
  somewhat 
  toothed, 
  etc. 
  

  

  