PARASITES OF FISHES OF THE WOODS HOLE REGION". 
433 
3. Paratxnia rnedusia Linton. [PI. xxvi, figs. 290-291.] 2, pp, 862-866, pi. xv, figs. 5-9. 5,p. 440. 7 , 
p.275. July 19, 1899; very numerous. 
Much smaller than specimens found in previous years. Dimensions in millimeters: Length of 
head and chain of 10 segments, 0.5; length of last segment, 0.2; length of head, 0.08; diameter of head, 
0. 08. In some the segments were rounded and the chain moniliform; in others the segments were 
squarish or rectilinear in outline and crowded together; but in all cases they separate easily from each 
other. 
4. Spongiobotlirium variabile Linton. 1 , pp. 462-464, pi. ii, figs. 13-16. 2, pp. 778-780. 5, p. 442. 7, 
. . p. 275. July 19, 1899; 13 from upper part of spiral valve. 
5. Rhinebotlirium flexile Linton. 2, pp. 768-771, pi. v, figs. 3-5. 7, p. 275. 
6. Rhinebotlirium cancellalum Linton. 7, p. 275. See under Rhinoptera bonasus, No. I. 
7. Phyllobothrium foliatum Linton. 2, pp. 787-794, pi. vi, figs. 5-10. 5, p. 443. 7, p.275. Aug. 24, 
1899; 9, and a large number of free proglottides. 
8. Antliocephalum gracile Linton. 2, pp. 794-796, pi. vn, figs. 1-2. 7, p. 275. 
9. Lccanieephalum petiatum Linton. 2, pp. 802-805, pi. ix, figs. 2-4. 7, p. 275. July 19, 1899; 4. 
10. Orygmatoboihrium crenulatum Linton. .5, pp. 444-445, pi. xxxiu, figs. 9-12, pi. xxxiv, fig. 1. 
11. Acanthobothriurn pa.ulurn Linton. 2, pp. 816-819, pi. vnr, figs. 1-7. 7, p. 275. July 19, 1899; 25 
in lower part of spiral valve. 
12. Onchobothrium uncinatum Diesing. 5, p. 446, pi. xxxiv, figs. 2-5. 
13. Rhynchobothrium liispidum Linton. 2, pp. 833-835, pi. xi, figs. 12-17. 7, p. 275. July 19, 1899; 
very numerous, with many ripe proglottides. The latter become dark colored, after lying in 
water for a few hours. The heads adhere very closely to the mucous membrane and may be 
overlooked by the inexperienced collector. 
14. Rhynchobothrium longispine Linton. 2, pp. 835-837, pi. xi, figs. 18-20. 
15. Rhynchobothrium tenuispine Linton. 2, pp. 837-838, pi. xii, figs. 1-2. 5, pp. 448-449, pi. xxxiv, 
fig. 8. 
16. Rhynchobothrium wageneri Linton. 2, pp. 843-845, pi. xii, figs. 10-12. 
17. Tetrarliynchus tenuis Linton. 2, pp. 853-855, pi. xiv, figs. 5, 6. 5, p. 452. 
18. Tetrarliynchus robustus Linton. 2, pp. 855-857, pi. xiv, figs. 7-9. 
19. Tetrarliynchus. Cysts in the stomach wall. 4, pp. 808-809. July 19, 1899; cysts under serous coat 
of stomach and pylorus; also a large one on the spleen. These were all filled with degenerate 
tissue, yellowish white and of a cheesy consistency. 
20. Synbothrium fllicolle Linton. [Syndesmobothrium filicolle. ] 2, pp. 861-862, pi. xv, figs. 2-4. 4, p. 
819, pi. lx vm, fig. 10. 7, p. 275. 
TREMATODES. 
21. Epibdella bumpusii Linton. External. 7, pp. 275, 286-287, pi. xxxiv, figs. 11-15. 
Mr. Vinal N. Edwards says that this ectoparasite is usually found on the sharp-nosed ray. 
22. Branchiobdella ravenelii Diesing. External. Found on several occasions. Report of U. S. Fish 
Commission for 1871-72, p. 624, pi. xviii, fig. 89. 
PROTOZOA. 
23. In the intestinal contents of a sting ray examined July 19, 1899, enormous numbers of small bodies 
were seen, long-elliptical in outline and measuring 0.014 mm. and 0.006 mm. in the two 
principal diameters [pi. i, fig. 5], 
Myliobatis freminvillei, Sharp-headed Ray. 
FOOD. 
The stomachs of the few specimens which I have examined have been empty, with the exception 
of one, in which were pieces of a large univalve mollusk, probably Sycotypus. 
CESTODES. 
All cestodes from spiral valve. 
1. Rhinebothrium. longicolle. Linton. 2, pp. 775-778, pi. vi, figs. 1-4. 5, pp. 441, pi. xxxiii, figs. 2-4. 
7, p. 275. 
F. C. B. 1899—28 
