Lop PLANTS OF RHODE ISLAND. 
el apie ec Je ie oe 
CHROOCOCCUS, Naegr. 
turgidus, Naegr. Common. 
Diatomacee.* 
EPITHEMIA, Kutz. 
gibba, Kutz. Providence. 
constricta, W. S. Rocky Point, 8. A. Briggs. 
Westermanni, Kutz. Newport, S. A. Briggs. 
turgida, Kutz. Providence, &c. 
granulata, Ehrb. Providence, &c. 
Sorex, Kutz. Rocky Point, S. A. Briggs. 
EUNOTHA, Ebrb. 
tetraodon, Ehrb. Providence; Rocky Point, S. A. Briggs. 
No. 168. 
Diadema, Ehrb. ‘‘Providence.’”’ No. 169. 
HIMANTIDIUM, Ehrb. 
pectinale, Kutz. Providence, Olney ; Rocky Point, Briggs; 
No. 170. 
arcus, Ehrb. Providence, Olney. No. 171. 
MERIDION, (Leibl.) 
constrictum, Ralfs. Providence, Olney; Rocky Point, 
Briggs. No. 172. 
circulare, Ag. Common, 
LICMOPHORA, Ag. 
flabellata, Grev. : Providence. 
Pappeana, Grev. Newport, S. A. Briggs. 
FRAGILARIA, (Lyngb.) 
capucina, Kutz. Common. No. 174. 
virescens, Ralfs. Common. No. 176. 
pectinalis, Ehrb. Common. No. 175. 
ASTERIONELLA, Hass. 
formosa, Hass. Very common in Pawtuxet water. 
Ralfsii, Sm. ? Meshanticut river. 
NITZSCHIA, (Hass.) Smith. 
Amphioxys, Ehrb. Providence. 
CHERATONEIS, Ehrb. 
longissima, Breb. Rocky Point, S. A. Briggs. 
linearis, Ehrb. Rocky Point, S. A. Briggs. 
*Diatoms follow naturally Desmids, but are removed in this list for conve- 
nience of reference to Mr. Wolle’s manuals on Desmids and F. W. Alge. 
