The morphology of a rather rare parasitic copepod was
studied. Ismaila monstrosa Bergh, an endoparasitic copepod was
found in the nudibranch, Antiopella fusca, at Coos Bay, Oregon.
Many anatomical features were found, which were different from
previous descriptions. Males were described for the first time.
Young males lacked the gonadal...
The acanthocephalan Echinorhynchus lageniformis Ekbaum,
1938, is a common intestinal parasite of the starry flounder, Platichthys
stellatus (Pallas), of Yaquina Bay, Lincoln Co., Oregon. Three
hundred and sixty-one flounders were examined and 146 (40.5 percent)
were found to harbor infections of E. lageniformis.
Cystacanths of E. lageniformis were found encysted...
Developmental series of Rana pretiosa (110 specimens), R.
cascadae (100 specimens) and R. aurora (115 specimens) were bone
stained and cleared in glycerin. The growth and developmental patterns
of the skull and selected bones were followed from the first
appearance of bone through adult stages. The sequential appearance
of the...
Righting behavior was examined in the asteroids Henricia
leviuscula and Leptasterias aequalis by repeating a standard laboratory
righting trial with a large number of individuals of each species,
and analyzing the observations made by statistical methods. Detailed
observations on the righting method, including leading pairs of
arms and righting time...
An investigation was undertaken to determine if respiratory
changes might occur in conjunction with migrations of the rough-skinned
newt, Taricha granulosa (Skilton) in and out of ponds in the
Willamette Valley. A field study was carried on from December
1964 through October 1965 to investigate certain physical and
chemical parameters...
The Mount Jefferson Primitive Area is one of three High Cascade wilderness areas in Oregon. It is second in size among these, covers approximately 136 square miles, and with the addition of a large roadless area in Warm Springs Indian Reservation represents the only one of these areas in Oregon...
A fluke found in the intestine of the red-legged frog, Rana
aurora Baird and Girard, was identified as Brachycoelium lynchi
Ingles 1936. The life cycle of this fluke was studied and found to
be of the lecithodendriid type rather than brachycoeliid. Instead
of having one intermediate host, as is the...
1. Distribution: A general map of distribution is given in the introduction, showing the range of the genus as a whole. A second, composite map, provides collection localities for the three species studied. Other maps indicate sites of collection for each individual species, including nests of P. longicaudus and P....