90 
Edwards, on DiatomaceiS. 
HOBOKEN, N.J. 
For the last three or four years I have searched a locality 
which is extremely rich in species,, and has never been 
described. It is a salt marsh, situated behind the town of 
Hoboken, in the State of New Jersey, and on the side of the 
Hudson River immediately opposite to the city of New York. 
It is a large swamp or marsh, of about two miles in length, 
so situated that the water of New York Bay runs into it at 
its southern extremity, and empties into the Hudson River at 
its northern end, just above Hoboken, and by means of a 
large brook, about six or eight feet wide, which has numerous 
smaller tributaries emptying into it. It was the mud from 
the bottom of this large stream that I first examined, and I 
then made more than a hundred gatherings of both living and 
dead Diatomacese, from different parts of the marsh, when 
the following species were found : 
Auliscus radiatus. 
Actinocyclus undulatus. 
Actinoplisenia splendens. 
Amphiprora alata. 
„ lepidoptera. 
Amphora ovalis. 
„ hyalina. 
„ salina. 
„ affinis. 
„ plicata. 
Achnanthes subsessilis. 
Biddulphia rhombus. 
„ aurita. 
Bacillaria paradoxa, 
Coscinodiscus subtilis. 
„ lineatus. 
„ oculus-iridis. 
„ radiatus. 
„ radiolatus. 
„ Actinoptychus. 
Cocconeis scutellum. 
„ placentula. 
Cocconema lanceolatum. 
„ cornutum. 
Colletonema eximium. 
Campylodiscus argus. 
Doryphora amphiceros. 
Eunotia iucisa. 
Encyonema prostratum. 
Epithemia Hyndmanui. 
„ turgida. 
„ musculus. 
Gramraatophora marina. 
HomcEocladia filiformis. 
Himantidium pectinale. 
Himaiitidium bidens. 
Melosira nummuloides. 
Navicula maxima. 
„ didyma. 
„ rhyncocephala. 
„ ambigua. 
„ Smithii. 
„ maculata. 
„ permagna 
„ formosa. 
„ elegans. 
„ angulosa. 
„ pusilla. 
„ rhombica. 
„ firma. 
„ lanceolata. 
„ cuspidata. 
Nitzschia linearis. 
„ dubia. 
„ scalaris. 
„ sigma. 
„ sigmoidea. 
Orthosira marina. 
Pinnularia egardensis. 
„ peregrina. 
„ major. 
„ viridis. 
„ borealis. 
„ longa. 
„ gracilis. 
Pleurosigma hippocampus, 
fasciola. 
„ balticum. 
„ tenuissimum. 
lacustre. 
