278 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



(E. pluviale, Nord. 

 (E. flavescens, Hass. 

 (E. ciliatum, Hass. 

 (E. calcareum, Wittr. 

 (E. longatum, Kiitz. 

 (E. tenellum, Kiitz. 



Members of this genus are freely found in several places 

 in the district. Individual species are subject to many- 

 variations and it is a matter of considerable difficulty to 

 classify them with absolute certainty. 

 Bulbochceta gracilis, Prings. 

 B. polyandra, Cleve. 

 B. setigera, Ag. 

 B. mirabilis, Wittr. 



Members of this genus very sparingly found, and 

 rarely met with in the reproductive stage. 

 Conjugate. 

 Family. — Zygnemace^: . 

 Zygnema pectination, Ag. 



Moreton, C. (B), Freshfield, L. (N), Huyton, L. (N), 



Shotwick, C. (N), Bromborough, C. (N). 

 Z. parvulum, Kiitz. 



Kensington, L. (N), Eaby, C. (N). 

 Z. cruciatum, Ag. 



Bromborough, C. (N). 

 Z. stellinum, Vauch. 



Moreton, C. (B). 

 Z. insigne, Kiitz. 



Huyton, L. (N). 

 Z. anomalum, Balfs. 



Bromborough, L. (N). Found generally in ponds 



and ditches. 

 Spirogyra crassa, Kiitz. 



Huyton, L. (N). 



