=" 
ae 
a 
PONS oR Op 
PLANTS OF RHODE ISLAND. 117 
BACILLARIA, Gmel. 
paradoxa, Gmelin. Newportand Rocky Point, S. A. Briggs. 
cursoria, Dorkin. Newport, S. A. Briggs. 
SYNEDRA, Ehrb. 
lunaris, Ehrb. Providence. 
pulchella, Kutz. Providence. 
gracilis, Kutz. Mark Rock, S. A. Briggs. 
undulata, Bailey. Newport, S. A. Briggs. 
Ulna, Ehrb. Common. No. 177. 
splendens, Kutz. Providence. 
Gallioni, Ehrb. Rocky Point, S. A. Briggs. 
tabulata, Kutz. Newport, S. A. Briggs. 
fulgens, W. S. Newport, S. A. Briggs. 
crystallina, Kutz. Rocky Point, Newport, Briggs. 
CYMATOPLEURA, Smith. 
solea, Breb. Providence. 
elliptica, Breb. Providence. 
SURIRELLA, (Turp.) 
biseriata, Breb. Common. No. 178. 
splendens, Kutz. Providence. 
CAMPYLODISCUS, Ehrb. 
simulans, Greg. Newport, S. A. Briggs. 
STRIATELLA, Ag. 
unipunctata, Ag. Newport, S. A. Briggs. 
RHABDONEMA, Kutz. 
arcuatum, Kutz. Newport, S. A. Briggs. 
Adriaticum, Kutz. Newport, S. A. Briggs. 
TABELLARIA,* Ehrb. 
flocculosa, Roth. Rocky Point, 8. A. Briggs ; Quidnesset. 
No. 179. 
fenestrata, Lyngb. Common. 
GRAMMATOPHORA, Ehrb. 
marina, Kutz. Newport, S. A. Briggs. 
islandica, Grev. Rocky Point, 8S. A. Briggs ; Providence, &c. 
PODOSIRA, Ebrb. 
hormoides, Kutz. Newport, S. A. Briggs. 
*T. Thwaitesii, Olney, n. sp. allied to T. flocculosa, Providence,” Alg. Rhod. 
No. 180, is not known by any drawing or description. 
