FISH PARASITES COLLECTED AT WOODS HOLE. 281 



(7) August 15; eight; stomach contents not noted. Cystic ducts with usual larv.-r. Tetra- 

 rhynchus larva 1 in stomach walls, not abundant. Numorous small, iininature nematodes on mesentery. 

 About 20 specimens of Echiiiorhynrhit* protnix in a cluster in one of the squeteagues, within about 

 25 mm. of the anal end of the rectum. The heads of these worms had penetrated the intestine and 

 the serous side of the intestine at this place was covered with cysts; some of the latter were opened 

 and revealed waxy concretions similar to those described in a former paper, though in these cases 

 all were small. (Entozoa of Marine Fishes, 1886, p. 497, pi. vi, lig. 5, <i and l>.) 



(8) August 1(5; one; stomach contents not noted, probably empty. Larva' in cystic duct and 

 gall bladder, as usual. 



(9) August 25; ten; stomachs with fish and squids. The usual larval cestodes in cystic duct and 

 gall bladder; also in the intestine others similar but smaller, and all with two red blotches in the neck. 

 Larval Tetrarhynchi encysted in stomach wall, small cysts and nematodcs on mesentery. One much 

 elongated blastocyst on mesentery of one of the fish. Length of anterior portion in life varying from 7 

 to 14 mm. ; length of the posterior slender portion, 75 mm. or more. When placed in the killing llnid 

 the anterior part, which in life was oblong and translucent, contracted to a globular shape, 5 mm. in 

 length, and became tense, opaque, and of a dead white color; the posterior portion, when straightened 

 in the lulling fluid, measured 90 mm. in length, and was transparent and colorless. The larva, when 

 liberated from the anterior portion, was found to have well- developed hooks on the proboscides, and 

 proved to bo a scolex of the species Tetrarhynchus erinaeetis Beneden. (Larval Cestode Parasites of 

 Fishes, pp. 811-812, pi. LXVII, ligs. 1-8.) 



28. Tautogolabrus adspersus, Cuinier. 



(1) August 10; six, small, 9 to 10 cm. in length; scales offish found in stomachs of three, others 

 empty, one cyst containing blastocyst and larval Rhyuchobothrinm. The proboscides were retracted 

 and the specimen was too immature for satisfactory determination. The arrangement of hooks sug- 

 gested I\. Intlliifer. (Cestode Parasites of Fishes, p. 448; Larval Cestode Parasites of Fishes, p. 793.) 



(2) August 16; one, a good-sized specimen; in stomach were bits of sea weed and a tunicate 

 (Cynthia partita}. Five or six amber-colored cysts on and in the testes and one of similar nature on 

 liver. These had the general appearance of a cestode cyst, but contained only waxy, degenerate 

 connective tissue. Two of the larger cysts were surrounded with patches of fat cells. 



(3) August 26; ten, small ; stomach contents not noted. Several small cysts, containing blasto- 

 cysts and larva 3 , on viscera. These appear to be the same as form mentioned in niy notes on Cestode 

 Parasites of Fishes, page 794, pi. LXIII, fig. 2. 



(4) September 5; five; stomach contents not noted. No entozoa found except in one. Skin 

 with immense numbers of cysts and pigment patches, producing a blue-black color effect which makes 

 the infected fish a very conspicuous object, due to immature distoma. For further details, see page 

 29(5 (figs. 76-81). 



29. Spheroides maculatus, Puffer. 



(1) June 13 and 14; one on each date; stomach contents not noted. Specimens collected by Dr. 

 F. P. Gorham. 



Numerous distoma from intestine and pharynx, large and small of same species. The largest 

 were from the pharynx, attached to the walls around entrance to the pouch. I refer this distomnm 

 to a new species, J>. ribe,r. See page 291 for description and general account. 



One cestode cyst (Tetrarhynchus sp.), a lernean, and one specimen of JEchinorhynchus, probably 

 E. acua, in bottle with the distoma. Mr. Gorham obtained all of these from the pharynx of the fish. 

 The Echiuorhynchus is a female; length, 10 mm. The hooks and general proportions, proboscis and 

 body, agree with E. acns. The specimen is much smaller, however, than is usual in that species. 

 The lemnisci were indistinctly seen. 



(2) July 20; one, small, less than 20 mm. in length. Small distoma, probably young of D. ribcx, 

 in intestine. Collected by Dr. F. P. Gorham. 



30. Mola mola, NM -//*/<. 



July 18; one; alimentary canal filled with digested material of the consistency of thick soup. 

 Vinal N. Edwards tells me he has usually found them "full of jelly-fish.'' The fish had been taken 

 off No Man's Land by a party from the Marine Biological Laboratory. The external parasites, of 

 which I was told there were many, probably Trixtonium rudolphianum, had been removed by the 

 capturing party and were not seen by me. 



