PARASITES OF FISHES OF BEAUFORT, NORTH CAROLINA. t05 



CESTODES. 



;;. Scolex polymorphus Rudolphi. 

 L902.— Aug. 20, few, small. 

 1. Rhynchobothrium sp. 



1901. — July 8 and 18, numerous, encysted in stomach wall. They agree with the form figured in 

 Larval Cestodes of Fishes, Proceedings of I'. S. National Museum, vol. xix, pi. iaiii, figs. 3-5. 



1902. — July 11, few, type with small oval cysts on viscera, short larva, and relatively long hooks. 

 5. Tetrarhyhchus bisulcatus Linton. 



1901. — July 31, Aug. 16, few, encysted in stomach wall. 

 1902.— July 11, few. Aug. 12, 3. 



TREMATODES. 



li. Dislomum appendiculatum Rudolphi. 



1901. — Aug. 1, 2, cylindrical, with line, regular, transverse wrinkles, under high magnification 

 resembling annulations; position and general character of to>tos. ovary, and vitellaria agree with this 

 species. Dimensions, in millimeters, lite: Length, not including appendix, 0.88; diameter of oral 

 sucker 0.069; pharynx, length 0.1 >4.">, breadth 0.034; ventral sucker, length 0. 12, breadth 0.13; diameter, 

 anterior 0.12, middle 0.49; ova 0.028 by 0.014. 



1902. — Aug. S, 1. [Fig. 153.] Annulate, with sharply serrate outlines in life. Testes 2, close 

 behind ventral sucker, diagonally placed. Seminal receptacle between testes and ventral sucker, 

 prostate, elongated, and conspicuous, ovary behind testes a distance equal to its own diameter; 

 Vitellaria 2, close to posterior edge of ovary, not lobed; uterus voluminous. Length, in millimeters, 

 1.12; maximum diameter 0.3; diameter of oral sucker 0.06, of pharynx 0.03, of ventral sucker 0.15; 

 ova 0.025 by 0.014. Aug. 20, 4, small. 



7. IHstomum monticellii Linton. 



1901. — Aug. 16, 1. Dimensions, in millimeters, life, compressed: Length 3.29, breadth 0.61; 

 diameter of oral sucker 0.17, of ventral sucker 0.38, of pharnyx 0.08; ovum 24 by 14 microns. 

 s. Dislomum vitellosum Linton. 



1901.— July 8, 31, 1 on each date. 



1902. — Aug. 8, 1. This specimen was remarkable for the elongation of the ventral sucker on a 

 pedicel; the fimbriated border around the ventral sucker was also unusually prominent. The speci- 

 men had no ova and appeared to be immature. Aug. Is, 2. These were of very different appearance, 

 the one from the other. One was oval and looked at first like IK pyriforme. The other at first had 

 somewhat the habit of body of D. appendiculatum. This diversity of form is not unusual in this 

 species. Specimens in the same lot are often found which hear but little resemblance to each other, 

 but which, after flattening under a cover glass in the presence of gentle heat, expand into identical 

 fi nins. 



COPEPOD PARASITES. 



9. Lernanlhropus sp. From gills. 



1902. — Aug. 18, 2, females with long egg chains. 



