west: additions to the alg^e of west Yorkshire. 97 



Cymatopleura elliptica Sm. Hawksworth. 



Cymatopleura solea Sm. Hawksworth — a small form, 102 \x 



in length, agreeing with Smith's figure of C. apiculata with the 



exception of the apicula. 

 ^Cymatopleura apiculata Sm. Marley. Horton Park; W. and 



G. S. West. 



^Cymatopleura hibernica Sm. Hawksworth. 

 Nitzschia sigmoidea Sm. Allerton. 

 "Nitzschia brebissonii Sm. Gordale. 



*Nitzschia tenuis Sm. Allerton. Gordale. Horton Park ; 

 Chellow Dean ; W. and G. S. West. 

 Nitzschia linearis Sm. Gordale ; Goole. 

 Nitzchia amphioxys Sm. Goole. Chellow Dean ; W. and 



G. S. West. 

 Nitzschia dubia Sm. *Var. /?. Chellow Dean ; W. and G. S. 

 West. 

 *Nitzschia acicularis Sm. Austwick. 

 Nitzschia lanceolata Sm. Near Mirfield. 

 Amphipleura pellucida Breb. Cullingworth. 

 *Navicula crassinervia Breb. Cullingworth. Adel Bog ; 

 W. and G. S. West. 

 Navicula cuspidata Kiitz. Elslack. 

 Navicula lanceolata Sm. Kildwick; Cullingworth. 



Navicula rhomboides (Ehrenb.) Greg. Cullingworth ; Baildon ; 

 etc. 



Navicula rhynchocephala Kiitz. Cullingworth ; Chellow 

 Dean ; W. and G. S. West. 



Navicula ovalis Sm. Marley ; Cullingworth. Chellow Dean ; 

 W. and G. S. West. 



*Navicula minutula Sm. Cullingworth. 

 Navicula affinis Ehrenb. Cullingworth ; Chellow Dean ; Adel 

 Bog ; W. and G. S. West. 



Navicula inflata Kiitz. Cullingworth ; Kildwick. 



*Navicula gibberula Kiitz. Marley. 



Navicula amphirhynchus Ehr. Eldwick. 



Navicula amphisbaena Bory. Near Bingley. 



"""Navicula dicephala Kiitz. Kildwick. 



*Navicula cryptocephala Kiitz. Bradford ; Cullingworth ; 

 Kildwick ; Baildon ; Wigton Moor, etc. 



April 1889. G 



