780 REV. E. N. BLOOMFIELD ON THE ALG.E OF SUFFOLK. 
Pleurosigma quadratum, W. Sm. Walton, Ipswich, &c. 
Common. 
,, angulatum, W. Sm. Walton, Ipswich, &c. 
Common. 
,, iEsTUARii, W. Sm. Walton, Ipswich, &c. 
Common. 
,, Balticum, W. Sm. Walton, Ipswich, &c. 
Common. 
,, fasciola, W. Sm. Walton, Ipswich, &c. 
Common. 
,, intermedium, W. Sm. Walton, Ipswich, &c. 
Common. 
,, acuminatum, W. Sm. Felixstowe. 
,, PRiELONGUM, W. Sm. Lake Lothing. 
,, tenuissimum, W. Sm. Walton. 
,, littorale, W. Sm. Ipswich, Orford. 
,, Hippocampus, W. Sm. Common. 
Doryphora amphiceros, Kiitz. Common. 
Amphiprora alata, Kiitz. Common. 
,, constricta, Ehren. Walton and Ipswich. 
,, vitrea, W. Sm. Walton and Ipswich. 
„ elegans, W. Sm. Walton, &c. 
Mastogloia Smithii, Thw. Ipswich. 
Rhoicosphenia curvata, Griin., var, marina, W. Sm. 
Epithemia musculus, Kiitz., var. constricta, W. Sm. 
Near Manningtree. 
Tryblionella acuminata, W. Sm. Ipswich, Sec. 
,, marginata ? Ipswich, &c. 
Nitzschia angularis, W. Sm. Ipswich. 
,, longissima, Ralfs. Felixstowe, Walton Ferry. 
,, longissima, Ralfs. var. 
,, Closterium, W. Sm. Felixstowe, Ipswich, &c. 
Surirella Gemma, Ehren. Common. 
Campylodiscus Hodgsonii, W. Sm. Near Ipswich. 
,, parvulus, W. Sm. Felixstowe and Ipswich. 
PoDosPHiENiA Ehrenbergii, Kiitz. Ipswich, &c. 
Rhipidopiiora elongata, Kiitz. Ipswich, See. 
,, paradox A, Kiitz. Ipswich, Sec. 
