No. 10.— MARINE OSTRACODA OF VINEYARD SOUND 
AND ADJACENT WATERS. 
BY JOSEPH A. CUSHMAN. 
Introduction. 
While both the marine and the fresh-water Ostracoda of European 
waters have been the subject of extensive monographs for more than 
half a century, those of the American side of the Atlantic have been 
little studied. With the exception of a single paper by Brady (’ 70 ) 
on some Ostracoda from the Gulf of St. Lawrence and the description 
of a single species by Stimpson, there are no papers on our recent 
species. The reason for the neglect of the marine species is not at 
all clear for the fresh-water species of the United States have been 
studied by several workers. Brady and Norman (’ 89 ) sum this up 
as follows: “The Ostracoda of the American side of the Atlantic 
have not been studied, and our endeavors to procure material from 
that portion of the area have hitherto failed. A few species from 
the Gulf of St. Lawrence were described some years ago by Dr. Brady, 
but nothing whatever is known of the species which inhabit the coasts 
of the United States.” This was written over fifteen years ago but 
the same condition of things still prevails. 
During the summer of 1905, through the kindness of the United 
States bureau of fisheries I occupied a table at the Wood’s Hole station 
and examined the dredged material. During the two months spent 
there, twenty-six species were found representing eleven genera. Of 
these, ten species and one genus are new. 
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NEW YORK 
BOTANICAL 
GARDEN. 
Sources of Material. 
The main source of material was the mud and sand in the small 
scrape dredge of the U. S. S. “Fish Hawk” which worked during 
the summer in Vineyard Sound. Nearly all of the dredge hauls were 
in ten fathoms or over and a number of them yielded Ostracoda. The 
knowledge of the Ostracod fauna would have been far less nearly 
