A HISTORY OF SUFFOLK The following is a list of most of the species known to occur ; a few of the diatoms are those of brackish water : — DiATOMACEAR Melosira Borreri, Grev. — varians, Ag. Cyclotella Kutzingiana, Chauvin — astraea, Kutz. Cylindrotheca gracilis, Grlln. Tabellaria flocculosa, KUtz. — fenestrata, KUtz. Meridion circulare, Ag. Diatoma vulgare, Bory — elongatum, Bory — Ehrenbergii, forma grandis, W. Sm. Fragilaria capucina, Desm. — mutabilis, GrUn. — construens,var. binodis, Grlln. Synedra Ulna, Ehren. — radians, W. Sm. — pulchella, Kiltz. Eunotia lunaris, GrUn. Achnanthes linearis, W. Sm. Cocconeis pediculus, Ehren. — placentula, Ehren. Navicula serians, Kutz. — cuspidata, Kutz. • — • Iridis, var. firma, W. Sm. var. producta, W. Sm. — elliptica, W. Sm. — elegans, W. Sm. — limosa, var. gibberula, Van Heurck. — ambigua, Ehren. — Amphisboena, Bory — tumens, W. Sm. — binodis, W. Sm. — pygmaea, KOtz. — major, Kotz. — 'nobilis, Kutz. — viridis, Ktltz. — oblonga, Kfltz. — peregrina, Kutz. — Tabellaria, var. 'acrosphaeria, Raben. — radiosa, KOtz. — acuta. Van Heurck. — gracilis, KUtz. — digitato-radiata, var. Cypri- nus. Van Heurck. — divergens, Ralfi — Brebissonii, Kutz. — Johnsonii, W. Sm. — mesolepta, Ehren. — Rabenhorstii, GrUn. — crucicula. Van Heurck. V'anheurckia rhomboides, Breb. Stauroneis Phoenicenteron, Eh- ren. — anceps, Ehren. var. linearis. Van Heurck. Pleurosigma acuminatum, W.Sm. — tttenuatum, W. Sm. — Spencerii, V/. Sm. DlATOMACEAE {cOJIt.) Gomphonema augur, Ehren. — constrictum, Ehren. — acuminatum, Ehren. — olivaceum, Ehren. Rhoicosphenia curvata, GrQn. Encyonema prostratum, Ralfs — caespitosum, Kutz. Cymbella affinis, Kotz. — cuspidatum, Kutz. — Ehrenbergii, Kutz. Cocconema lanceolatum, Ehren. — cymbiforme, Ehren. — Cistula, Ehren. Amphora salina, W. Sm. - — hyalina, Kutz. — ovalis, Kotz. var. affinis, KUtz. var. pediculus, Kutz. Epithemia turgida, W. Sm. — sorex, Kutz. — zebra, Kutz. — gibba, Kutz. — ventricosa, KUtz. Bacillaria paradoxa, Gmel. Nitzschia sigmoidea, W. Sm. — linearis, W. Sm. — sigma, W. Sm. — spectabilis, Ralfs — Amphioxys, W. Sm. — vivax, W. Sm. — bilobata, W. Sm. — plana, W. Sm. — acicularis, W. Sm. — gracilis, Raben. — lanceolata, W. Su.. — constricta, Pritch. Cymatopleura Solea, W. Sm. var. apiculata, Pritch. — elliptica, W. Sm. Surirella biseriata, Breb. — linearis, W. Sm. — gracilis, GrUn. — striatula, Turp. — Brightwellii, W. Sm. — minuta, Breb. — ovata, Kutz. var. salina, W. Sm. Campylodiscus noricus, var. costata, W. Sm. — Echineis, Ehren. The following are marine diatoms : — Podosira hormoides, KUtz. — maculata, Sm. Melosira nummuloides, Ag. — sulcata, Kutz. Hyalodiscus stelliger. Bail. Coscinodiscus excentricus, Ehren. DlATOMACEAE (cOHt.) Coscinodiscus radiatus, Ehren var. concinnus, W. Sm. Actinoptychus undulatus, Ehren. Auliscus sculptus, Ralft Eupodiscus Argus, Ehr. Actinocyduscrassus.Van Heurck. Biddulphia aurita, Breb. — pulchella. Gray — rhombus, W. Sm. — Smithii, Van Heurck. — Favus, Van Heurck. Synedra affinis, Kutz. — fulgens, W. Sm. — superba, Kutz. Achnanthes longipes, Ag. — brevipes, Ag. Schizonema eiimium, Thur. — crucigerum, W. Sm. — GreviUii, Ag. Cocconeis scutellum, Ehr. — diaphana, W. Sm. Navicula Smithii, Ag. — didyma, Ehren. — marina, Ralfs — Hennedyi, var. clavata. Van Heurck. — Lyra, Ehren. — directa, W. Sm. — aspera, Ehren. Scoliopleura Westii, GrUn. — latestriata, GrUn. — tumida, Rabenh. Stauroneis salina, W. Sm. Pleurosigma formosum, W. Sm. — decorum, W. Sm. — speciosum, W. Sm. — rigidum, W. Sm. — elongatum, W. Sm. — strigosum, W. Sm. — quadratum, W. Sm. — angulatum, W. Sm. — Aestuarii, W. Sm. — Balticum, W. Sm. — Fasciola, W. Sm. - — intermedium, W. Sm. — acuminatum, VV. Sm. — praelongum, W. Sm. — tenuissimum, W. Sm. — littorale, W. Sm. — Hippocampus, W. Sm. Doryphora amphiceros, Kutz. Amphiprora alata, Kutz. — constricta, Ehren. ^r vitrea, W. Sm. — elegans, W. Sm. Mastogloia Smithii, Thw. Rhoicosphenia curvata, var. marina, W. Sm. Epithemia musculus, var. con- stricta, W. Sm. Tryblionella acuminata, W. Sm. 76
