WEST: ADDITIONS TO THE W.GJE OK WEST YORKSHIRE. 99 



* Himantidium soleirolii Kiitz. Kildwick. 



Himantidium undulatum Sm. Cullingworth. 



Himantidium gracile Ehrenb. Elslack. Cullingworth. Deeming ; 

 Marley ; Adel Bog ; W. and G. S. West. 



Himantidium pectinale K. Cullingworth. 

 *Odontidium mesodon Kiitz. Horton Park ; W. and G. S. 



West. 

 "*Odontidium mutabile Sm. Marsden ; Howgill Fells ; Culling- 

 worth. 

 Odontidium hyemale Kiitz. Howgill Fells. 



Fragilaria capucina Sm. Adel Bog ; W. and G. S. West. 



Sedbergh, etc. 

 *Achnanthes exiiis Kiitz. Cautley Spout. This occurred in 

 immense quantities, the stipites being attached to the stipites 

 of Gemphonema geminatum Ag. and G. ventricosum Greg. 

 Diatoma elongatum Ag. Doncaster. 



Tabellaria ventricosa Kg. Cullingworth ; Wigton Moor. 

 Leeming ; Rombald's Moor, &c. ; W. and G. S. West. 



Tabellaria flocculosa Kiitz. Cullingworth. Frequent all over 



our millstone grit district. 

 Tabellaria fenestrata Kiitz. Cullingworth. 

 Melosira orichalcea Kiitz. In plenty near Marsden. 

 Melosira varians Greg. Woolley ; Bingley ; Steeton. 

 *Melosira nivalis Sm. Gilstead. 

 Melosira granulata Pritch. Chellow Dean ; W. and G. S. West. 

 Asterionella formosa Hass. Chellow Dean ; W. and G. S.West. 



An asterisk has been prefixed in error to Staurastrum dejectum 

 Meyen Var. apiculatum Breb. 



The above list comprises ioo species and n varieties and forms 

 additional to those already recorded for the riding. 



In the ' Flora of West Yorkshire' one diatom has (I think) been 

 numbered twice, ' Frustulia olivacea Kiitz.' in the Addenda being 

 already recorded as ' Gomphonema olivaceum Ehrenb.'; therefore 381 

 is the correct number of species of Alg?e recorded in the 'Flora,' 

 and not 382. With these additions the total number will now 

 reach 481 species and 26 varieties and forms. 



Cosmarium orthostichum (Lund) has also by a mistake been 

 entered in the ' Flora' under Staurastrum. 



April 1889. 



