PARASITES OF FISHES OF BEAUFORT, NORTH CAROLINA. 



385 



9. Tetrarhynchus bi&idcatvs Linton. 



1901. — July 17, encysted in stomach wall, not numerous. July 19, Aug. 6, 7, and 12; few oneacb 

 date. July 30; a few cysts with degenerate tissue found in stomach wall. 

 1902.— July 16, Aug. 13, 18, 19, 20, few each date. 



10. Synbolhrium sp. [Figs. 116-118.] 



See introduction and No. 13 under Pomatomus. 



1901. — July 19, 1, on viscera; larva with curved hooks. Aug. 1; 1, an elongated blastocyst; while 

 no larva could be made out in this specimen, the resemblance of the blastocyst to this species was very 

 close. Aug. 12; 1, blastocyst from viscera. 



1902..— July 16, 1, blastocyst, length 93 mm. 



TREMATOIIKS. 



11. Distomum vWeUosum Linton. 



1901. — July 30, a single small specimen, without ova, and in poor condition; resembles I>. vilellosum, 

 but with pharynx and acetabulum relatively smaller than usual in that species. 

 1902. — Aug. 13, 1, small, immature. 



12. Distomum polyorchis Stossich. 

 In vicinity of pyloric caeca. 



1901. — July 17, 1; length 0. breadth 1.4; 14 testes visible on each side. Specimen not in good 

 condition. July 19; 14 collected from 4 trout. 

 1902.— July 16, 5. Aug. 18; 3. 



13. Distomum sp. 



1902. — Aug. 13, 1. This is identical with No. 4 under Spheroides maculatus. 



14. Microcotyle sp. 



1902. — Aug. 18, 4, small, length 1.5 mm. from gills. The specimens were in poor condition. 



Cynoscion nebulosus, Spotted Weak-fish. 



NEMATODES. 



1. Immature nematodes (Ascaris sp.) 



1901. — July 15, 22, 29, few. July 31; numerous, on viscera. These were noted a.s belonging 

 to type designated in these notes as having a slender diverticulum extending caudad from base of 

 oesophagus and a short diverticulum extending cephalad from anterior end of intestine. July 31; 

 clusters of cysts on rectum; tissue degenerate, somewhat waxy; in others the contents were of the 

 nature of fine-grained, tenacious masses in a semifluid. Aug. 28; 20 or more. Intestine of larger 

 specimens dark brown; c esophagus relatively short; diverticula as in preceding; post-anal region 

 rather short-conical. There were also numerous cysts of degenerate tissue on the mesentery which 

 appear to be due to this worm. 



1902.— Aug. 11, few. 



CESTODES. 



2. Scolex polymorphus Rudolphi. 



1901.— July 29, 31, few; from intestine; small with prominent anterior sucker. Aug. 21; few; 

 collected from cystic duct. Aug. 28; numerous; not seen in the cystic duct by Mr. Stone, who 

 collected them, but they resemble those collected on former occasions from the cystic duct of this tish 



B. B. F. 1904—25 



