2S4 BULLETIN OF THE UNITED STATES FISH COMMISSION. 



38. Limanda ferrugiiiea, Sand Dal. 



June 29; one specimen of Dibothrium punctatum (Cestode Parasites of Fishes, pp. 430-431) ; col- 

 Irrird by Mr. S. R. Williams from the intestine of the flounder OH the above date. 



39. Pseudopleuroiiectes americanus, Winter Flounder. 



(1) July 25; two, small ; stomachs empty ; one with six Eclnnorhynchus acus (Entozoa of Marine 

 Fishes, in, pp. 525-528, pis. i, figs. 1-11; vin, figs. 89-90) in intestine. These were colorless and yel- 

 lowish white, with the exception of the bursze of the males, which were bright orange. 



(2) Specimens of E. acus from intestine; collected by Mr. S. R. Williams June 11 and July 2. 



(3) July 25; one; collected by Dr. Ulric Dahlgren; five specimens of E. acus from intestine. 

 '4) September 5; one, small; stomach empty; no entozoa found. 



40. Lophius piscatorius, Goose-fish. 



(1) August 11; one; stomach empty. 



Numerous cestode cysts in the mesentery. One of these was opened and the blastocyst yielded a 

 specimen of Rhynchobothrium speciosum (Larval Cestode Parasites of Fishes, pp. 801-805, pi. LXIV, figs. 

 13-14; pi. LXV, figs. 1-7); other species also represented not yet identified. The intestine contained 

 immense numbers of the larval cestodes, small, and like those observed in this host in previous years, 

 with two red pigment patches in the neck. They possess considerable vitality and were active 

 after being in normal salt solution for twenty-four hours. While living, these specimens attached 

 themselves firmly to the bottom of the dish with their suckers, the body floating in the water. Even 

 strong suction with a pipette often failed to dislodge them at first. (Larval Cestode Parasites of 

 Fishes, pp. 789-792, pi. LXI, figs. 4-15.) Several neruatodes escapsuled in the mesentery and a consid- 

 erable number, apparently the same species, free in the intestine. These were small and immature. 



(2) August 20; one; stomach empty. A number of cestode cysts found in the walls of stomach 

 and intestine, for the most part under the serous coat, but also found involving the deeper layers, some 

 of them even showing more plainly on the inner than on the outer side of the intestinal wall. 



Enormous numbers of the small larval form with two red pigment spots in the neck, noted above 

 No attempt was made to estimate the number. There were certainly many thousands of Ihein within 

 a small area and they occurred for the greater part of the length of the intestine. 



Three Acanthocephali, apparently Echinorltynchus acus (Entozoa of Mar. Fishes, in, pp. 525-528, 

 pi. i, figs. 1-11, pi. viii, figs. 89-90), 22, 30, and 31 mm. in length, respectively, all females, found in 

 intestine. 



(3) May 28. A few nematodes obtained from the liver of a goose-fish by Mr. Lawrence E. Griffeu 

 on above date, similar to those mentioned above in part at least, probably identical with Ayamo- 

 nema capsularia Diesing. 



In previous years I have found Ascaris increscens, Ascaris sp. (immature), and others probably 

 belonging to the genus Ascari.s, but too young for satisfactory determination. 



