FRESH WATER DIATOMS. 
297 
Coscinodiscus pellucida. 
Meridion intermedium. 
C. Americana. 
Nitschia punctata Sm. 
C. griseus. 
N. Tryblionella. 
Cymbella gastroides K. 
N. circumsuta Bail. 
C. lanceolata. 
N. thermalis. 
Cyclotella Meneghiniana. 
N. angularis W. Sm. 
Diatoma tenue C. Ag. 
N. longissima Rail’s. 
D. hyemale Lyngb. 
N. granulata Grun. 
Encyonema ventricosum K. 
N. paradoxa Grun? 
Eunotia pectinalis. 
N. constricta Grun (?) 
E. lunaris. 
N. littoralis G. 
E. major. 
N. levidensis. 
Fragillaria Pacifica Grun? 
Rhoicosphenia curvata Grun. 
Fr. construens? Grun. 
Schizonema ramossissimum Ehr. 
F. mutabilis Grun. 
Stauroneis spicula Dick. 
Gomphonema angustatum. 
Surirella Mollerianum Grun. 
G. exiguum. 
S. crumena Breb. ( = S. Brightwellii 
Licmophora Lyngbei G. 
W. Sm.) 
Mastogloia octogona. 
S. striatula Turp. 
M. crenulata. 
Synedra arcus Ktz. 
Navicula roteana Grun. 
Plagiotropis vitrea. 
N. permagna Bail. 
Licmophora tincta. 
N. minuscula. 
As to these forms the writer is in doubt as to how they 
should be referred. It may, however, be said that Coscinodiscus 
is essentially a marine genus, Smith giving only one species 
(C. minor) as being of fresh water habitat. The Cymbellas, as 
given by Smith, are all fresh water forms. The Cyclotcllas 
include both fresh and salt water species. 
I. Diatoms from soundings (4 fathoms), St. John River, 
above Gregory’s Point at foot of Long Reach : 
Epithemia Argus W. Sm. 
Epithemia turgida Ehr. 
Tabellaria fenestrata Kutz. 
Synedra lunaris Ehr. 
Synedra ulna Ehr. 
synedra radians, 
j^avicula elliptica Smith. 
Navicula rhynchocephala? Kutz. 
Stauroneis. 
Surirella. 
Melosira subflexilis Kutz. 
Cocconeis scutellum Ehr. 
Gomphonema geminatum A. 
