PARASITES OF FISHES OF THE WOODS HOLE REGION. 
457 
Lobotes surinamensis, Flasher. 
ACANTHQCEPHALA. 
1. Echinorhynchus pristis Rudolphi. Intestine. Variety tenuicornis. 3, pp. 531-532, pi. lvi, tigs. 
39-41, and pi. i/vii, figs. 42-53. 
NEMATODES. 
2. Immature nematode ( Ascaris ). Intestine. Collected Aug. 6, 1887. [PL xn, figs. 140-142.] 
The worm is finely wrinkled transversely, tapers equally to head and tail; the tip of the latter is 
conical and covered with minute bristle-like but short papilla?. Dimensions in millimeters: Length, 
11.25; diameter of head 0.12, 1 mm. back of head 0.32, maximum 0.34, 1 mm. from posterior tip 0.27, 
at anal aperture 0.11; length of upper lip, 0.08; distance from anal aperture to posterior tip, 0.11; 
length of oesophagus, 2.16. 
3. Ichthyonema globiceps Rudolphi. Peritoneum. Aug. 3 and 6, 1887. [PI. xvnr, figs. 209, 210.] 
Two specimens in the first lot, 510 mm. and 580 mm. in length and 1.48 mm. in diameter. They, 
are of nearly uniform diameter throughout and bluntly rounded at each end. The intestine is dark- 
brown for two-thirds of its length, white for the remaining third. It ends blindly at its posterior 
extremity. When the worm was subjected to pressure the young were discharged in vast numbers 
from a point about I mm. from the anterior end. 
Dimensions of embryos in millimeters: Length, 0.4; diameter at larger end 0.008, maximum 
0.013; smaller end attenuate, appearing as a mere line even when highly magnified. There are four 
dark-brown granular masses scattered along the middle region of the body and among them several 
light-colored reiractile bodies. A slight notch was noticed at the larger end of some. A favorite 
position is with the larger end bent rather sharply ; the slender end is often likewise bent, so that the two 
ends point toward each other. Where they occur in the greatest abundance in the parent worm they 
give to the latter a plump, even distended, appearance. After they have been discharged the parent 
is transparent, collapsed, much contracted, and quite irregular in outline, in places flattened and 
shriveled. The larger end is said to be the anterior. I was not acquainted with this assertion at the 
time of viewing the living worms, but supposed from the appearance and behavior of these embryos 
that the slender end is the anterior. 
CESTODES. 
4. , Synbothrium Jilicolle Linton. On viscera. 4 , p. 815. 
TREMATODES. 
5. Gaslerostomum ovatum Linton. Intestine. 7 , p. 297. (Linton: Monostomum orbiculare Rudolphi. 
<», pp. 541-542, pi. liv, figs. 2-5.) 
Stenotomus chrysops, Soup. 
FOOD. 
A few food notes were given in my report for 1898, pages 280-281. In the summer of 1899 I 
examined 58 large and 51 small scup on 17 different occasions from July 20 to August 30. In the 
stomachs of the larger, small fish and squids were most frequently found, but annelids, crabs, shrimps, 
amphipods, rnollusks, and hydroids were also noted. The smaller contained copepods and other 
small crustaceans. Some small specimens from Katama Bay, August 30, had in their stomachs 
annelids, small Crustacea, and small crepidulse. 
Twenty-six scup were examined in the summer of 1900, with practically the same results as given 
above, viz, fish, small Crustacea of various kinds, annelids, small bivalve rnollusks, and a young 
sea-urchin. Intestinal contents of a specimen taken August 29 revealed plates from the body walls 
of a holothurian. A few ova of Distomum pyriforme were seen in this material along with the 
holothurian plates, spines of annelids, and vegetable debris. 
ACANTHOCEPHALA. 
1. Echinorhynchus acus Rudolphi. On viscera. 3, p. 527. 
2. Echinorhynchus sagittifer Linton. July 24, 1900. See I, pp. 493—496, pi. vi, figs. 1,2. 3, pp. 535- 
536, pi. lix, fig. 80. 
