PARASITES OF FISHES OF THE WOODS HOLE REGION. 
461 
this species and was essentially like the process observed in Epibdella bum,pusii ( 7 , p. 287). At 
intervals of about twenty seconds a mass of yolk could be seen to leave the yolk reservoir and proceed 
the short distance required to reach the definite point in the duct where an active muscular organ 
molded a shell around the mass. It was then forced forward into the uterus. The lobed ovary, shell 
gland, yolk reservoir, and beginnings of the uterus are so closely crowded together that further details 
of the process could not be made out. Length of these specimens (alcoholic) 4 to 7.5 mm. 
COPEPODS. 
16. Mention may be made also, among entozoan parasites of the squeteague, of a copepod found 
beneath the skin of the opercular bone, by Mr. E. E. Tyzzer. 7 , p. 285, pi. xxxiii, figs. i-5. 
Sciaenops ocellatus, Red Drum. 
NEMATODES. 
1. Ascaris sp. [PI. vni, figs. 79, 80, and pi. ix, figs. 81-83.] 
Collected by S. E. Meek, Fulton Market, New York, from fish taken off Sandy Hook, September 
8, 1886. Three males and two females and four small, slender, immature. Habit of body in larger 
specimens, stout. Dimensions of female in millimeters: Length, 56; diameter of head 0.41, 1 mm. back 
of head 0.56, maximum 1.8, 1 mm. from posterior tip 0.9, at anal aperture 0.56; distance of anal 
aperture from posterior end, 0.65; length of oesophagus, 6.5. These dimensions include the loose 
cuticular membrane. (Esophagus in females somewhat linear-fusiform, with its greatest diameter about 
its posterior third; in the males somewhat flask-shape, and 2.25 mm. in length in a specimen measuring 
20 mm. in length. Largest male, 27 mm. in length. Four postanal and twenty-nine preanal papillae 
were counted on the left side, and two postanal and twenty-nine preanal on the right side. Length of 
spicules about 2 mm. 
2. Ascaris sp. Immature. [PL xii, figs. 134—137.] 
Probably young of No. 1, encapsuled in peritoneum. Tail blunt, rounded, with mucronate tip; 
oesophagus long and linear; intestine dark-brown. Dimensions in millimeters: Length, 16; greatest 
diameter, 0.43; length of oesophagus, 2.65. 
Menticirrus saxatilis, King-fish. 
FOOD. 
Twenty-seven small specimens were examined on five occasions in July and August, 1899, and 
one large specimen August 3, 1900. July 28, 1899; intestines filled with small amphipods, isopods, and 
shrimps. August 5, 1899; small crustaceans. August 7, 1899; shrimps, amphipods, isopods, annelids. 
August 8, 1899; large shrimp with eggs on swimmerets, young fish, and bryozoa. August 28, 1899; 
annelids. August 3, 1900; pieces of fish, bryozoa. 
NEMATODES. 
1. Immature nematodes (Ascaris). [PI. xiv, figs. 168-171.] 
Collected by Vinal N. Edwards, November, 1886. These were very numerous on the stomach 
and liver; slender, white, smooth, head truncate, tail ending with a mucronate spine. Another lot in 
U. S. National Museum collection, specimens somewhat larger, rudimentary lips of Ascaris discernible 
and tail not much prolonged beyond anal aperture; mucronate tip to tail not spine-like. These are 
probably an older stage of the same. The spine-like character of the mucronate tip apparently lost 
by the shedding of the embryonic investment. Dimensions in millimeters: Length, 21; diameter 
of head 0.25, middle 0.4, at anal aperture 0.09; distance of anal aperture from posterior end, 0.13. 
Corresponding dimensions of more mature specimens: 25; 0.24, 0.42, 0.16; 0.16. 
CESTODES. 
2. Larval cestodes ( Scolex polymorphus Dujardin). In intestine. See 4, p. 289, etc. Found Julyand 
Aug., 1899, Aug., 1900. Those obtained on the latter date were very small. 
