228 



YORKSHIRE NATURALISTS UNION. 



cyathlgenim, Gidogonium 

 cyclicum, Cosmarium 

 Cyclotella, Genus ... 

 cylindricum, Desmidium 

 Cylindrocapsa, Genus 

 Cylindrocapsacese, Family 

 Cylindrocystis, Genus 

 Cylindrospermum, Genus 

 Cylindrotheca, Genus 

 cylindrus, Peniuni ... 

 Cymatopleuia, Genus 

 cymatopleurum, Cosmarium 

 Cymbella, Genus ... 

 Cymljelleaii, Family . . . 

 cymbiformis, Cymbella 

 Cynthia, Closterium... 

 Cypiinus, Navicula ... 

 cyrtocerum, Stauiastrum 

 cyslifera, Gloeothece 

 Dactylococcopsis, Genus 

 Dactylococcus, Genus 

 Dactylothece, Genus 

 Dactylus, Navicula ... 

 Dansei, Mastogloia .. 

 Davidsonii, Cosmarium 

 Debarya, Genus 

 DeBaryi, Cosmarium 

 debilis, Nitzschia 

 decedens, Cosmarium 

 decorum, Closterium 

 DeGreyii, Mesotsenium 

 dejectum, Staurastum 

 delicatissima, Synedra 

 delicatula, Cymbella 



Schizochlamys 



delicatulum, CEdogonium 



Staurastrum 



Denticula, Genus 



Nitzschia... 



denticulata, Micrasterias 

 denticulatum, Euastrum 



Staurastrum 



denticulatus, Scenedesmus 

 depressa, Mougeotia 

 depressum, Spondylosium 

 Desmidiacere, Family 

 Desmidium, Genus ... 

 DeTonii, Staurastrum 

 devia, Gloeothece ... 

 diagonum, Aptogonum 

 Dianse, Closterium ... 

 Diatoma, Genus 

 Diatomece, Family ... 

 dicephala, Navicula... 

 dichotoma, Vaucheria 

 dichotomum, Gomphonema 



