488 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
lateral alee extend about 2 mm. back of head and are about one-tenth mm. broad at the widest part. 
Postanal region short, conical. Dimensions of one of the specimens in millimeters: Length, 37; 
diameter of head 0.18, maximum of body 0.5, 1 mm. from posterior end 0.45, at anal aperture 0.18; 
distance of anal aperture from posterior end, 0.15; length of oesophagus, 3.5. 
4. Immature nematodes (Ascaris) . [PI. xv, figs. 185-187.] 
A. From intestine. Numerous examples of immature nematodes were found in the intestine of 
a goose-fish August 30, 1887. Body of nearly uniform diameter, tapering nearly equally to each end; 
greatest diameter a little in front of middle; body crossed with regular transverse striae. Dimensions 
in millimeters: Length, 8; diameter 1 mm. back of head 0.36, 1 mm. from posterior end 0.28, at anal 
aperture 0.11; distance of anal aperture from posterior end, 0.22; length of oesophagus, 1.5. 
B. Encapsuled in peritoneum, over viscera generally, and sometimes on wall of body cavity [pi. 
•xiv, figs. 179,180]; often in great numbers. I have record of three finds of these worms, July and 
August. In the U. S. National Museum collection there are 11 lots from this host, nearly all collected 
by Mr. Vinal N. Edwards. In most cases the specimens are of various sizes up to 45 mm. and 48 mm. 
in length. In the larger specimens the posterior ends are more abruptly pointed than in the smaller, 
suggesting A. increscens. Bodies crossed by fine transverse stripe. The worms are usually coiled in a 
helix or fiat coil, and sometimes are surrounded with a brown, waxy secretion of degenerate connective 
tissue in the capsule. In one lot a few were seen to be penetrating t he walls of the stomach. In one 
of the lots three immature females were found in which the upper lip corresponds with Schneider’s 
figure of Ascaris rigida Budolphi. The body is slender, tapering for a short distance at each end, 
crossed by exceedingly delicate transverse stripe, which are about 0.003 mm. apart. Dimensions in 
millimeters: Length, 18; diameter of head 0.12, of body 0.33, at. anal aperture0.ll; distance of anal 
aperture from posterior end, 0.15. 
5. Cucullanus globosus Zeder. [PI. xvn, fig. 205.] 
A single specimen, a male from the intestine of a goose-fish, agrees with those from the cod, 
which I have referred to this species. See under Gadus callarias, No. 3. Dimensions, in millimeters: 
Length, 12; diameter of head 0.3, maximum of body near base of oesophagus 0.3; length of oesophagus, 
1.55; length of copulatory spines, 1; axial diameter of bursa, 0.38. 
CESTODES. 
6. Larval cestodes (Scolex polymorphus Dujardin). Free in intestine. 1 , p. 454, pi. vi, figs. 8,9. 4 , 
p. 789, etc. 7 , p. 284. Found also Aug. 5 and 18, 1899, and Aug. 20, 1900. On latter date 
numerous, with two red pigment patches in neck. 
7. Ehynchoboihrium imparispine Linton. Encysted. 4 , p. 800, pi. lxiv, fig. 12. 
8. Rhynchobothrium speciosum Linton. Encysted. See 4 , p. 801, etc. 7 , p. 284. Found Aug. 18, 
1899, in cysts on intestine. 
9. Tetrarhynchus (?) . Cysts. 4 , p. 809. 
