Edible Mollusca of the Oregon Coast 185 
the west coast. It thrives well and reaches a large size in Wash- 
ington and Oregon where the species has taken possession of 
nearly all of the prominent bays. On the Oregon coast it is 
especially abundant in Netarts Bay, where it is the dominant spe- 
cies, being well protected in the gravel beds. This clam is also 
abundant in the mud flats of Yaquina River on both sides of the 
channel between the towns of Yaquina and Newport. The species 
is a conspicuous one in the coastal waters of Oregon, where con- 
ditions are favorable for it, as far south as Coos Bay (Figures I, 
Ii, IV). Winchester Bay at the mouth of the Umpqua River 
is well supplied with this clam but it is entirely wanting in the 
tide flats of the Siuslaw River. 
Schizothaerus nuttalli is very short lived when removed from 
the water and, therefore, is chiefly used as food locally. Quan- 
tities of this species, however, are canned by tourists on visiting 
the coast during the summer and carried away for future con- 
sumption. This is also one of the species made use of by the 
cannery at Tillamook City in the preparation of minced clam 
products. 
4. Mya arenaria Linnaeus. 
The “long neck clam,” which was transported from the Atlan- 
tic coast many years ago, probably with oyster spat, has become 
well adapted to conditions in many localities on the Pacific coast 
where it inhabits the mud flats of bays and rivers often advancing 
up the latter several miles from the ocean but always remaining 
within the influence of salt water. The species has established 
itself on the Oregon coast in nearly all of the protected bays and 
many of the rivers from Coos Bay northward. In the Siuslaw 
River, between the towns of Florence and Acme about 4% miles 
from the ocean, are very extensive beds and the finest specimens 
of Mya arenaria that have come under the writer's observation 
in the northwest (Figure III). Here on both sides of the chan- 
nel, but mostly on the north shore, large areas of mud flats are 
exposed during even a moderately low tide. Many of the shells 
of clams taken here measure more than six inches in length. 
This locality supplies the local demand as well as the markets of 
the upper Willamette Valley towns. Although the species has 
Lo] 
