HULLKriN OF THE NATl^RAL HISTORY SOCIETY. 
;^oo 
]\riid from Narrows of St. John River. Swift Point, 25 faths. 
Rhabdonema minutum. 
Tabellaria. 
Cyclotella Kutzingiana. 
Melosira nummuloides Kutz. 
Melosira. 
Epithemia. 
Synedra. 
Nitschia. 
Narrows of St. John River, Plankton collection: 
Navicula Smithii var. ovalis. 
Navicula viridis Ktz. 
Melosira nummuloides Kutz. 
Melosira varians Ag. 
Isthmia enervis Ehr. 
Actinoptychus undulatus. 
Amphiprora omata. 
Cocconeis. 
Campylodiscus cribrosus W. Sm. 
Coscinodiscus radiatus. 
Doryphora Boeckii \V. Sm. 
Tryblionella. 
Bacillaria paradoxa Gmcl. 
Cocconema lanceolatum Ehr. 
Synedra salina W. Sm. 
Synedra radians? W. Sm. 
Navicula Smithii var. ovalis. 
Navicula viridis W. Sm. 
Surirella striatula Turp. 
Surirella elegans? 
Bacillaria paradoxa Gmel. 
Pleurosigma attenuatum W. Sm. 
Tabellaria fenestrata Kutz. 
Zygoceros Mobilensis Bail. 
In the occurrence of Isthmia this gathering shows distinctly 
marine conditions, while Bacillaria paradoxa is decidedly a 
brackish water form. 
Diatoms from old wharves at Indiantown : 
Melosira nummuloides Kutz. Bacillaria paradoxa Gmel. 
Melosira. • Navicula. 
Nitschia closterium W. Sm. 
Bacillaria paradoxa Gmel, said to be the most wonderful of 
all Diatoms, was found very abundantly near the ferry landing, 
and its curious movements, so suggestive of animality, may be 
readily observed in fresh collections from that point. Several 
species of Diatoms, such as Doryphora, Synedra, IMelosira and 
Navicula, may be obtained from the tidal creek at Stetson’s 
Mill. Scrapings from booms above Indiantown yielded the 
following: ' 
Synedra radians? W. Sm. 
Rhoicosphenia curvata Green. 
Tryblionella scutellum W. Sm. 
Cocconeis. 
Nitschia sigma W. Sm. 
Melosira nummuloides Ktz. 
Melosira subflexilis Ktz. 
Surirella ovata Kutz. 
Homoecladia sigmoidea in tubes. 
