PARASITES OF FISHES OF THE WOODS HOLE REGION. 
465 
Chilomycterus schoepfi (C. geometricus, Diodon maculo-striatus) , Puffer , Porcupine-fislx. 
NEMATODES. 
1. Ascaris neglecla Leidy. [PI. v, figs. 33-36.] 
Two specimens from intestine of this fish July 21, 1887, are referred to this species; one male 
and one female, the latter with the anterior end missing. Leidy’s description of this species is: 
“Body cylindro-fusiform, most narrowed anteriorly; head naked; lips large and obtuse; tail short, 
conical, acute. Length of female 2 inches, breadth three-fifths of a line; male about half the size.” In 
these specimens the body is transversely wrinkled, producing a beautifully crenulated margin, the 
crenulations themselves being made finely dentate by transverse lines. Tail mucronate, the tip slightly 
roughened. No postanal papillse were made out. There are twenty preanal papillae, more or less, on 
each side arranged in a single row; those immediately preceding the anal aperture are the smaller. 
The papillae suggest A. habena. The length of the fragment of a female was 15 mm., and its diameter 
1.3 mm. It exhibited the same crenulate margin with dentate detail of outline as the male. 
Dimensions of male in millimeters: Length, 26; diameter of head 0.17, 1 mm. from anterior end 
0.21; maximum diameter, near posterior end 0.8, 1 mm. from posterior end 0.62, at anal aperture 
0.15; length of head 0.15; distance of anal aperture from posterior end 0.13; length of oesophagus 6.3; 
length of copulatory spines 4.25, breadth 0.02. 
CESTODES. 
2. Ligula cMlomycteri. 4 , pp. 788-789, pi. lxi, fig. 1. 
Mola mola (Molci rotunda), Sun-fish. 
FOOD. 
I add the following to the meager food notes made in my report for 1898 [ 7 , p. 281]: July 19, 
1899; 1. Stomach and intestine filled with chyle resembling thick soup or gravy, with remains of 
salpre and possibly ctenophores. July 30; 1. The alimentary canal, which in this singular fish is little 
differentiated into stomach and intestine, and in this individual measured 3.7 meters (12J feet), 
contained a thickish soup or gravy-like chyle, which in places was held together by a viscid mucus. 
A large number of salpae and numerous small, pinkish amphipods were found, the latter more abundant 
toward the lower part of the intestine. July 10, 1900; 1 (weight, 286 pounds). The alimentary canal 
contained a yellowish-gray soup-like chyle. Food material not distinguishable. July 29; 1. Taken 
by the schooner Grampus south of Gay Head. A large jelly-fish is reported by Mr. C. W. Stone from 
the stomach. 
ACANTHOCEPHALA. 
1. Echinorlvynchus acus Rudolphi. 
A fragment found with a lot of trematodes from the gills, collected by Vinal N. Edwards, July 13, 
1881, appears to belong to this species. 
NEMATODES. 
2. Immature nematode. [PL vi, figs. 51,52.] 
A small specimen was found encapsuled on the intestine, July 10, 1900. 
CESTODES. 
3. Dibothrium microcephalum Rudolphi. Intestine. 2 , pp. 736-745, pi. ii, figs. 5-18. 7 , p. 282. 
Thirty-three specimens were obtained July 30, 1899. Twenty of these were normal. In the 
others the first, and sometimes the second joint also, was elongated and slender. [PI. xxv, figs. 270, 
271.] A similar condition was noted in 2 , pp. 736-737. Thirty-three, also obtained on July 10, 1900, 
longest 150 cm.; total length of worms about 30 meters (100 feet). July 29, 1900; numerous. Mr. 
C. W. Stone reports that the harpoon passed through the intestine, and that, the tapeworms were 
in consequence much broken. Only a few were preserved. The largest fragment, which consists 
of mature proglottides throughout, measures 86 cm. in length and 10 mm. in breadth at widest 
part. It is 7 mm. wide at anterior end and of nearly uniform breadth, narrowing, however, at 
posterior end. Another fragment, with scolex attached, which may be a part of the same worm, is 
17 cm. in length. 
F. C. B. 1899—30 
