FISH PARASITES COLLECTED AT WOODS HOLE. 275 



tinal wall. One of the specimens had no entozoa; the other had in the spiral valve 1 large and 6 

 small specimens belonging to Monticelli's genus Calyptrobothrium, which I refer to a new species, 

 C. occidentaUs. See p. 2'J8 for description. 



(2) July 26; one; contents of stomach and intestine as in lot (1), vi/, brown, viscid mucus. In 

 the intestine the only identifiable food substance was the crystalline lens of a fish. Two specimens of 

 C. occidentaUs in spiral valve. Three cysts in intestinal wall, each containing blastocyst and a larval 

 Rhynchobothrium agreeing with form described in Notes on Cestodo Parasites of Fishes, page 800, pi. 

 i. xiv, tigs. 9-11 (A*, imparispine). The liberated larva remains attached to the blastocyst, which 

 possesses an exhalent pore at the posterior end, and evidently functions as a nutrient vessel for the 

 young worm. This torpedo was taken at the same time as those examined on July 25, but had been 

 kept alive in a tank until the next day. 



(3) August 22; one, large female with one young; the stomach contained a partly digested flounder 

 (Paralichthys dentatua) about 45 centimeters in length. No entozoa except what seemed to be loose 

 segments, immature, of a small cestode in the spiral valve. 



10. Dasyatis ceiitrura, Stingray. 



(1) July 29; two; stomachs empty. The first specimen yielded the following cestotles: 

 Anthobothrium pulvinatum, 40 (Cestode Parasites of Fishes, pp. 439-440, pi. xxxin, fig. 1). 

 Rhinebothrium flexile, 1 (Entozoa of Marine Fishes, n, pp. 768-771, pi. v, figs. 3-5). 

 Rhinebothrium cancellation, 3 (Entozoa of Marine Fishes, n, pp. 771-775, pi. v, figs. 6-8). 

 Anthoceplialum gracilc, 10 (Entozoa of Marine Fishes, n, pp. 794-796, pi. vu, figs. 1,2). 

 Phyllobothrium foliatnm, 16 (Cestode Parasites of Fishes, p. 443, pi. xxxni, fig. 6). 

 Pai-ata'nia medusia, 12 (Cestode Parasites of Fishes, p. 440). 



Rhynchobothrium hispiditm, numerous (Ento. Mar. Fishes, n, pp. 833-835, pi. xi, figs. 12-17). 

 Synbothrium ftlicolle, from cyst, 1 (Larv. Cest. Par. Fishes, pp. 815-820, pi. vin, figs. 7-12). 

 A few cysts in spleen and stomach-wall for most part consisting of degenerate tissue. The second 

 specimen, a very large one, had been dead some five or six hours before the parasites were removed. 

 They were not in first-class condition. The following entozoa were obtained : 

 Ehincbothrium Jtexile, 1. 



Spongiobothrium variabile, 1 (Cestode Parasites of Fishes, p. 442). 



Lecaniccphalum peltatum, 9 (Entozoa of Marine Fishes, n, pp. 802-805, pi. ix, figs. 2-4). 

 Acanthobothrium paulum, 30 (Entozoa of Marine Fishes n, pp. 816-819, pi. vm, tigs. 1-7). 

 With exception of the cysts the above-named cestodes were found in the spiral valves of the rays. 



(2) August 1; one; stomach with remains of a crustacean (Callianassa). The following cestodes 

 were obtained from the spiral valve: Anthobothrium pulvinatum, 2, and numerous free proglottides; 

 Spongiobothrium variabile, 1; Anthocephalinn yracile, 3, longest measuring 46 mm. Phyllobothrium foli- 

 atnm, 9; Rhynchobothrium hispidum, numerous. 



Free proglottides from several of these cestodes were observed to keep up active progressive 

 movements in sea-water for four hours after they were collected, that is until they were killed. The 

 resemblance, in such cases, to a trematode is very striking. 



(3) August 17; one, small; stomach empty. No parasites, except a few cestode cysts in spleen 

 and stomach- wall. Some of these contained blastocysts, but the larv;e were too young to be identi- 

 fied, probably Rhynchobothrium. 



(3) August 18; one. This ray was placed in the pool and was not killed during my stay at 

 Woods Hole. Six external trematode parasites collected, Epibdella bumpitsii sp. nov. See page 286. 



(4) August 22; one, small; stomach empty. One Anthobothrium pulvinatum in spiral valve. One 

 cyst in spleen from which a blastocyst was obtained, not far enough developed for identification. 

 Other cysts in wall of stomach and pylorus had degenerated to yellow masses of cheesy consistency. 



(5) August 25; one; stomach empty. In spiral valve were found: Anthobothrium pulvinatum, 2; 

 Phyllobothrium foliatum, 1; Paratcenia medusia; Rhynchobothrium sp. 



11. Myliobatis fremiiivillei, Sharp-nosed Ray. 



July 27; one; stomach contained pieces of fleshy part of some large univalve uiollusk, probably 

 Sycotypus. From the spiral valve were obtained: 



Rhynchobothrium longicoUe (Cestode Parasites of Fishes, p. 441, pi. xxxni, figs. 2-4) very numerous 

 Rhynchobothrium agile (Cestode Parasites of Fishes, p. 451, pi. xxxiv, figs. 12-15) 30. 



