352 
Family XI — MELOSIBEHS. 
Genus Cyclotella Kutzing. 
C. operculata. Kiitz. Frequent in fresh water. 
C. kutzingi ana. (Thwaites.) Fresh or brackish water; Ormeshy 
Breydon, Flordon, Biver Bure. 
C. minutula. Kiitz. Ormesby, Whissonsett, Horning. 
C. rotula. Kiitz. Ormesby, Breydon. 
C. punctata. (Sm.) The Xene, near Wisbeach ; Titchwell, 
Breydon. 
C. dallasxana. (Sm.) Very rare — iu one of the Breydon 
ditches. 
C. papillosa. (0. Meara.) Bare — in one of the Ormesby 
gatherings. 
C. scotica. Kiitz. Biver Bure, near Yarmouth. 
Genus Coscinodiscus Ehrenberg. 
C. radiatus. Ehr. Hunstanton sands ; stomachs of Koctilucai, 
Yarmouth ; Breydon — rare. 
C. excentricus. Ehr. Same localities as the preceding species. 
C. ovalis. (Boper.) Hunstanton sands — frequent. 
C. conoinnus. (Sm. nec Ehr.) Stomachs of Xoctilucse. 
C. minor. (Kiitz.) Breydon, AVells, Hunstanton. 
C. nitida. (Greg.) Hunstanton sands — rare. 
Genus Eupodiscus Ehrenberg. 
E. argus. Ehr. Bare — in mud from Yarmouth Harbour. 
Genus Auliscus Ehrenberg. 
A. sculptus. (Sm.) Bare — Yarmouth Harbour, Breydon. 
Genus Actinocyclus Ehrenberg. 
A. ralfsii. (Sm.) Stomachs of Xoctilucm, Yarmouth ; Hun- 
stanton sands. 
A. suBTiLis. (Greg.) Associated with above species. 
