DIATOMS OF NEW BRUNSWICK. 
389 
narrow channels referred to, it is everywhere occupied, above 
and between the bridges which span it, by a dense growth of 
eel grass, and in dragging a plankton net through the latter, 
even for a distance of a few feet only, this becomes completely 
filled with the mud adherent to the grass. This mud is very 
largely composed of Diatoms, including the sixty or more species 
enumerated below, while the piers of the bridges are also covered 
with a dense growth, consisting mainly of concatenate and 
filamentous forms, such as Melosita , Grammatophora and 
Tabellaria. 
Acnanthes longipes Ag. 
Acnanthes subsessilis Ehr. 
Actinoptychus undulatus Kutz. 
Amphiprora pellucida. 
Amphiprora vitrea. 
Amphora costata W. S. 
Amphora ovalis Kutz. 
Bacillaria paradoxa Gmel. 
Biddulphia aurita Breb. 
Himantidium arcus W. Sm. 
Homoecladia filiformis. 
Homoecladia sigmoidea W. S. 
Hyalodiscus subtilis. 
Melosira nummuloides Kutz. 
Melosira varians Ag. 
Melosira Borerii Grev. 
Navicula aspera Kg. 
Navicula Baileyana. 
Biddulphia (Zygoceros) Mobilensis BaiNavicula brevis (?) 
Colletonema subcohaerens Thw. 
Campylodiscus. 
Cocconeis scutellum Ehr. 
Cocconeis placentula Ehr. 
Cocconema lanceolatum Ehr. 
Cymbella cuspidata Kutz. 
Coscinodiscus eccentricus Ehr. 
Coscinodiscus minor Ehr. 
Coscinodiscus omphalanthus (?) 
Cyclotella. 
Doryphora Boeckii. 
Navicula didyma Kutz. 
Navicula elegans W. Sm. 
Navicula elliptica Kutz. 
Navicula forcipata Grev. 
Navicula humerosa. 
Navicula longa. 
Navicula Lyra. 
Navicula nobilis Ehr. 
Navicula semen Kutz. 
Navicula Smithii Ag. 
Odontidium mesodon K. 
Doryphora (Raphoneis) amphiceros KtzlOdontidium hyemale. 
Epithemia argus W. Sm. 
Epithemia musculus Kutz. 
Epithemia turgida Ehr. 
Epithemia zebra Ehr. 
Eunotia monodon Ehr. 
Eunotia tetraodon Ehr. 
Fragillaria capucina Desm. 
Gomphonema constrictum Ehr. 
Gomphonema geminatum Ag. 
Grammatophora marina Kutz. 
Pinnularia acuta W. Sm. 
Pinnularia nobilis Ehr. 
Pinnularia viridis Ktz. 
Podosphenia. 
Pleurosigma Balticum W. S. 
Pleurosigma acuminatum. 
Pleurosigma elongatum (?) W. S. 
Pleurosigma strigilis Sm. 
Pleurosigma strigosum Sm. 
Plagiotropis vitrea Grun. 
