442 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
CESTODES. 
3. Larval cestodes ( Scolex polymorphus Dujardin). Small. Free in intestine. Aug. 28, 1899. For 
account of similar forms, see 4 , pp. 789-792. 
TREMATODES. 
4. Distomum sp. [PI. xxxii, fig. 354.] Aug. 7, 1899; 12. Aug. 28, 1899; 4. Intestine. 
Body very minutely spinose, white, translucent; acetabulum and oral sucker about same size; 
outline of body, long oval; neck, short, continuous with body; greatest breadth in region of testes, near 
posterior end; ecaudate; acetabulum sessile; rami of intestines simple, elongate; oesophagus as long as 
pharynx; testes, two, in median line behind uterus; seminal vesicle dorsal to ovary and posterior 
border of acetabulum; ovary between acetabulum and testes, on right side; pharynx, subglobular; 
genital aperture in front of acetabulum, on median line; vitelline glands lying at posterior end and 
along sides of body as far as acetabulum; ova, few, relatively large. Dimensions of specimen in 
formalin, given in millimeters: Length, 2.72; breadth, anterior 0.43, at acetabulum 0.89, middle 1.07, 
near posterior 0.36; diameter of oral sucker, 0.26; diameter of acetabulum, 0.29; diameter of ovary, 
0.21; diameter of testes, 0.33 and 0.39; ova, 0.11 and 0.07 in the two principal diameters. 
5. Distomum tornatum Rudolphi. Aug. 7, 1899; 2. Length, 8.5 mm. 
Body unarmed, appendiculate; acetabulum larger than mouth, latter subterminal; caudal appendix 
elongate; cirrus minutely papillate. Dimensions in millimeters, from sections: Oral sucker, length 0.22, 
thickness 0.19; diameter of pharynx, 0.13; diameter of acetabulum, 0.43; ova, 0.14 and 0.007 in the 
two principal diameters. See 6 , pp. 513-514, pi. xui, figs. 6-12. 
6. Diplostomum sp. Globular cysts in liver. Aug. 30, 1899; specimens from Katama. Diameter of 
cysts in sections, 0.3 mm. [PI. xxvii, fig. 307.] 
Cyprinodon variegates, Short. Minnow. 
I have no record of entozoa from this species. Wart-like tumors, caused by myxosporidia 
( Myxobolus lintoni Gurley), are occasionally found. A few have been seen by me in different seasons, 
but no formal record of them has been kept. 7 , p. 277. Linton, U. S. Fish Commission Bulletin 
for 1889, pp. 99-102, pi. x.xxv. Gurley, U. S. F. C. Bulletin for 1891, p. 414. Gurley, U. S. F. C. 
Report for 1892, p. 238, pi. xxvii. 
Tylosurus marinus, Gar-Ji.sh. 
Fish and shrimps. 
FOOD. 
ACANTHOC'EPHALA. 
1. Hchinorhynchus agilis Rudolphi. Aug. 11,1899; 4. Intestine. For account of this species, see * 2 , 
p. 490, and 3 , p. 534. 
CESTODES. 
2. Larval cestodes (Scolex polymorphus Duj.). Small. Free in intestine. Aug. 11, 1899; few. 7, p.277. 
TREMATODES. 
3. Gasterostomum sp. [PI. xxxiv, figs. 367-368.] 7, pp. 277, 298, pi. xli, fig. 91. Aug. 7, 1899; 11. 
Thirty gars were examined, and this species found in considerable abundance. It was noted 
that the body was armed with short, rod-like, deciduous spines. Dimensions of living specimen in 
millimeters: Length, 1.43; diameter, anterior 0.28, median 0.65, posterior 0.25; ova, 0.017 and 0.012 
in the two principal diameters. 
Tylosurus acus ( Tylosurus caribhxus), Ilound-fish. 
I have examined but one specimen of this gar — taken in Buzzards Bay, July 27, 1886. Several 
specimens of a goose barnacle ( Conchodenna vergata) were attached to the top of head behind the eyes. 
Where the barnacles were rooted, the skin was off and the skull of the fish exposed. 
