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Family IV — SUFI R E L L E/E. 
Genus Campylodiscus Ehrenberg. 
C. costatus. (Sin.) Apparently rare in this county, a few frustules 
occurring in gatherings from Whissonsett, Tittleshall, 
Hickling, and St. Faith’s 
C. echeneis. Ehr. Bare — brackish-water ditches, Breydon. 
C. parvulus. (Sm.) Associated with the preceding species. 
C. clypeus. Ehr. Very pure and fine in a ditch near the Berney 
Arms ; first found living by the late Mr. E. Wigham. 
C. bicostatus. (Sm.) Very rare — in a ditch at Breydon. 
Genus Surirella * Turpin. 
S. biseriata. (Breb.) This species occurs sparingly in the 
Hickling, Whissonsett, and Tittleshall gatherings. 
S. splendida. (Kiitz.) Hickling, Cossey, Tittleshall. 
S. constricta. (Sm.) Very rare — in a ditch near Breydon. 
S. gemma. (Ehr.) Copious in gathering from the North river, 
near Yarmouth ; more or less common in all brackish- 
water localities. 
S. striatula. Turp. Very copious and fine in all the Breydon 
ditches. 
S. apiculata. (Sm.) Eare — St. Faith’s Common. 
S. bright wellii. (Sm.) Plentiful in a gathering made by the late 
Thomas Brightwell, Esq., at Titchwell, but rare in other 
brackish water localities. 
S. ovata. (Kiitz.) More or less common in slightly brackish or 
fresh-water ditches ; copious in a ditch at Keswick. 
S ovalis. (Breb.) Eare — Breydon, Burgh, Titchwell. 
S. subsalsa. (Sm.) Very rare — in a Breydon gathering. 
S. linearis. (Sm.) Associated with S. splendida , of which it is 
probably a variety. 
Genus Cymatopleura Smith. 
C. solea. Sm. Common — in all fresh-water gatherings. 
* Pfitzer, in his work, “ Ueber das Ban und Entwicklung der Diato- 
maceen,” changes the name to Suriraya, this genus having been named after 
Dr. Suriray. 
