PARASITES OF FISHES OF THE WOODS HOLE REGION. 
487 
PROTOZOA. 
11. Sporozoa. [PL i, fig. 4.] 
Two small specimens from Katama Bay were examined August 28, 1900. The walls of the intestine 
of one throughout almost the entire length and of the other for a short distance were completely 
covered with sporocysts. The cysts were irregular where crowded together; where not crowded together, 
which was in but few places, they were elliptical or spherical, of various sizes, but comparatively few 
reaching 1 mm. in diameter and none much exceeding that. Spores oblong-ovate about 0.003 mm. in 
length by 0.0015 mm. in diameter. Intestine where affected was chalky-white in color. 
Glyptocephalus cynogiossus, Craig Flounder. 
NEMATODES. 
1. Ascaris sp. Immature. [PI. ix, figs. 95,96.] 
One specimen, which agrees closely with No. 1 under Hemilripterus americanvs in the U. S. National 
Museum collection; locality not given. The habit of the body is stouter than that of the specimens 
from the sea raven, and the upper lip is relatively larger and more oval. It is somewhat attenuate in 
front, increasing posteriorly; short pointed back of anal aperture, with mucronate tip. The latter, 
when highly magnified, is seen to be rough tuberculate and the anal aperture has prominent rounded 
lips. Measurements in millimeters: Length, 40; diameter of head 0.33, 3 mm. back of head 0.58, 
maximum 1.5, 3 mm. in front of anal aperture 1, at anal aperture 0.48; distance of anal aperture from 
posterior tip, 0.48. 
Achirus fasciatus, Hog-choker. 
FOOD. 
Eight specimens examined August 2 and eleven on August 11, this summer (1900), had only 
vegetable debris ( Fucus and eelgrass) in the alimentary canals. 
TREMATODES. 
1. Distomum appendiculatum Rudolphi. Intestine. One specimen Aug. 10, 1900. See 7, p. 289. 
This distome was found in two other species of fish (alewife and sea robin) taken in seine at the 
same time as the host of this worm. These fish were taken at the head of Buzzards Bay, at Wareham. 
2. Two small distomes, young. [PI. xxxt, fig. 351.] 
One of these distomes, when flattened under the compressor, was elliptical in outline. Dimensions 
of living specimen in millimeters: Length, 0.26; breadth, 0.20; oral sucker, length 0.07, breadth 0.06; 
acetabulum, diameter 0.05. 
Lophius piscatorius, Goose-fish. 
FOOD. 
Aug. 30, 1887. — A specimen taken south of Cuttyhunk had in its stomach a large quantity of 
mud which was rich in mollusca, annelids, and small crustaceans. 
Aug. 5, 1899. — A small specimen had in stomach a winter flounder almost as large as the 
goose-fish. 
Aug. 18, 1899. — Alimentary canal with fragments of fish. 
ACANTHOCEPHALA. 
1. Ecldnorhynchus acus Rudolphi. Intestine. 3 , p. 525, etc. 7, p. 284. Aug., 1899; 3. 
2. Echinorliynchus incrassalus Molin. Peritoneum. 3 , pp. 533-534, pi. lviii, figs. 54-69u. 
NEMATODES. 
3. A scar is increscens Molin. [PI. viii, fig. 64.] 
U. S. National Museum collection; Vinal N. Edwards, collector; five specimens; females. Body 
slender, attenuate anteriorly, of nearly uniform size for the posterior two-thirds of the length. The 
