440 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
Alosa sapidissima, Shad. 
NEMATODES. 
1. jlscaris sp. [PI. xn, figs. 138,139.] 
Immature; body slender, jaws prominent, apparently four teeth on upper lip; posterior end 
terminates in an acute conical point, roughened in most cases with minute spines; length, 12 mm. 
These specimens, from U. S. National Museum collection, were in a bad state of preservation when 
examined by me; date of collection and locality not given. 
Brevoortia tyrannus. Menhaden. 
FOOD. 
See Peck’s valuable contribution, The- Sources of Marine Food, Bulletin U. S. Fish Commission 
for 1895, pages 351-368. 
Thirty-two menhaden were examined in July and August, 1899, on eight different occasions. 
The character of food could be determined only by the use of the microscope, and was invariably 
vegetable material, especially diatoms. Large numbers of diatoms of many kinds were found in the 
intestines of some young specimens, 36 mm. in length, on July 28, 1899; also in an adult specimen 
on August 25, 1899. 
CESTODES, 
1. Cysts and blastocysts ( Synbothrium ) on viscera. 7 , p. 277. 
2. Larval cestodes ( Scolex polymorphic Dujardin). Small. Free in intestine. 7, p. 277. July 17, 24, 
27, and Aug. 3, 1899. For account of similar forms, see 4, pp. 789-792. 
TKEMATOBES. 
3. Distomum appendiculatum Rudolphi. 7 , p. 289, pi. xxxvi, figs. 25, 26. Aug. 3, 1899; a few in 
intestine. 
4. Distomum vitellosum Linton. See 7 , p. 290, pi. xxxvn, figs. 38, 39. One specimen found July 27, 
1899. See under Clupea harengus, No. 6. 
Stolephorus brownii, Striped. Anchovy. 
FOOD. 
Fifty-two anchovies examined on seven occasions in 1899, from July 26 to Aug. 15. Intestines 
usually filled with copepods, but in a few 7 cases immense numbers of univalve mollusks were found 
along with copepods. , 
NEMATODES. 
1. Immature nematode. July 26, 1899; 1. Aug. 15, 1899; 1. 
CESTODES. 
2. Larval cestodes (Scolex polymorphus Dujardin). Small. Free in intestine. July 26, 1899, and Aug. 
3, 1899; several. For account of similar forms, see 4 , pp. 789-792. 
3. Jihynchobothrium. Cyst on viscera. Aug. 15, 1899; 1. 
TKEMATODES. 
4. Distomum appendiculaUtm Rudolphi. July 31,1899; 12. Aug. 3,1899; few. 7, p. 289, pi. xxxvi, 
figs. 25, 26. 
5. Distomum sp. [PI. xxix, figs. 319, 320.] Aug. 12, 1899. Slender; minutely spinose. 
The life dimensions in millimeters are: Length, 1.71; diameter, anterior 0.09, greatest diameter 
(one-third of length from head) 0.26, at middle 0.21, near posterior end 0.11; diameter of anterior 
sucker, 0.07; acetabulum, length 0.10, breadth 0.13; ova, 0.021 and 0.011 in the two principal diameters. 
A mounted specimen is decidedly fusiform, with greatest diameter near the middle, at the 
acetabulum. The neck is conical; the anterior sucker somewhat elongated; the pharynx globose, 
remote from oral sucker, and followed by a slender oesophagus, which is longer than the pharynx. 
The median and posterior parts of the body are filled with ova. Dimensions of mounted specimen 
in millimeters: Length, 1.16; oral sucker, length 0.07, thickness 0.045; diameter of acetabulum 0.09; 
pharynx, length 0.034, thickness 0.041; diameter of body, anterior 0.065. at acetabulum 0.345, near 
