﻿72 
  Boyer: 
  Rare 
  species 
  of 
  Diatomaceae 
  

  

  C^s:planatfon 
  of 
  plate 
  2 
  

  

  The 
  figures 
  are 
  all 
  magnified 
  600 
  diameters. 
  

  

  Fig. 
  I. 
  Synedra 
  anguinea 
  Boyer. 
  

  

  FiG. 
  2. 
  Glyphodesmis 
  tmnida 
  Boyer, 
  

  

  Fig. 
  3. 
  Auliscus 
  fioridanus 
  Boyer, 
  

  

  Fig. 
  4. 
  Auliscus 
  kyalinus 
  Bover, 
  

  

  Fig. 
  5. 
  Aulacodiscus 
  oregonus 
  Harv. 
  & 
  Bail., 
  abnormal 
  form. 
  

  

  Fig. 
  6- 
  NUzschia 
  semicostata 
  Boyer. 
  

  

  Fig. 
  7, 
  Pinmdaria 
  Hagelsteinii 
  Boyer. 
  

  

  Fig. 
  8. 
  Synedra 
  incisa 
  Boyer. 
  

  

  Fig, 
  9. 
  Navicula 
  Attwoodii 
  M. 
  Perag. 
  

  

  Fig. 
  10. 
  Glyphodesmis 
  campechiana 
  Boyer. 
  

  

  Fig. 
  II. 
  Dimerogramnta 
  intermedium 
  Boyer. 
  

  

  Figs. 
  12, 
  13. 
  Eunotia 
  Stevensonii 
  Boyer. 
  

  

  Figs. 
  14, 
  15. 
  Surirella 
  F 
  aimer 
  i 
  Boyer. 
  

  

  