759 
Genus Brebissoxia Grunow. 
B. Boeckii. (Kg.) I’l'cydon. 
Genus Stauroxeis Ehrenberg. 
S. ACUTA. (Sin.) Whissonsett : rare. 
S. AXCEPS. Ehr. Horning Fen. 
S. Gonxn. (Hilse.) Moss, 0.sier (Jar, Ileigliam. 
S. GR.vciLis. Ehr. Whissonsett, Orinesby. 
S. Grecorii. (Grun.) Breydon. 
S. Lecumax. (Kg.) Moss, Osier Gar, lleigham. 
S. SAUXA. (Sin.) JJitches, Breydon, Yarmouth, Burgh St. Peter. 
S. spicuL.v. (llickio.) Burgh: very rare. 
Genus Ampiiipbeura Kiit/ing. 
A. PELUUCIDA. (Kg.) Orinesby ; not iincominon in this localit}'. 
Genus Sciiizoxema Agardh. 
S. comoides. (Agardh.) Yarmouth. 
S. cRUCiGERUK. (Siu.) Burgh St. Peter. 
S. Grevillii. (Agardh.) Yarmouth ; growing on the posts of the 
Britannia Pier. 
Genus C0LLETOXE.MA Brebisson. 
C. EXiMiUM. ( L'hw.) liiver Bure, Breydon Ditches. 
C. XEor.ECTUM. (Thw.) Forma minor. Breydon. 
C. YULGARE. (Thw.) Breydon. 
Genus Berkleya Greville. 
B. Dillwyxii. (Grun.) Breydon !^[arshes. 
Genus Stictodesmis Greville. 
S. CRATicuLA. (Ehr.) Whissonsett, Ormesby, Costessey. 
Genus Amphiprora Ehrenberg. 
A. AEATA. (Kg.) Very fine in a ditch at Caister, near Yarmouth 
common in salt and brackish water. 
A. coxsTRiCTA. (Sm.) The river Bure, near ^ armouth. 
