PAEASITE8 OF PISHES OF BEAUFOET, NoKTH CAROLINA. 341 



12. Tetrarhynchus robvMus Linton. 



1902. — July 26, 10, in stomach and intestine. The heads were much larger than those of '/'. bisulcatus, 

 tlit' collars looser, with uneven or somewhat broken posterior borders. July 29, 3. 



I:;. SyhbothriumJUicoUe Linton. 



1902. — July 11, few; July 26, several, from cysts in stomach wall, a few possibly free in the 

 stomach. Several dark-colored cysts wire cut out of the stomach wall, bat owingtothe lateness of 

 the hour were not examined until the next day. No larvae were noted at the time of collecting. The 

 material was left in sea water over night. When the cysts were examined in the morning several 

 specimens of Synbothrium were found associated with the cysts, from which they hail evidently 

 emerged. When the alcoholic material was reexamined a few days later a dark-colored cyst was found 

 to contain degenerate waxy tissue with probicides of S. filicolh ■ 



It would appear that some of these parasites had penetrated the mucous membrane of their host 

 as larva with blast. .cyst attached and there became encysted. 



14. Oysts. 



1902. — July 11, 2 in mesentery. These cysts were translucent, the larger 9 by 11 mm., the other 

 somewhat smaller. The larger cyst was opened, but nothing was found in the lymph with which it 

 was tilled but a small blood clot. 



PARASITIC coPEPODS. 



15. Pandarus sp. 



1902.— July 29, 5, dark-brown. 



Carcharhinus milberti, Blue shark. 



1!M!2. — July 25, 1. The identification of this shark was made with the. aid of Jordan & Gilbert's 

 Fishes of North America. While not agreeing with the description of this species in all particulars it 

 was in closer agreement with it than with any other described by the above-named authors. 



The shark was caught by Mr. Russell J. Coles of Danville, Va., with rod and reel. It was a 

 female with young, exceptionally thick-bodied, and over 9 feet in length. Alimentary canal empty, 

 except for a few small fragments i crystalline lenses, etc. i of fish, a plate from the test of a sea urchin 

 and a few thin strips of vegetable tissue. 



NEMATODES. 



1. Immature nematodes (Ascaris). 



1902. — July 25, 10. This is the type with elongated bulbular basal portion of oesophagus and 

 corrugated post-anal region. The parasites had evidently been recently introduced with the food. 



CESTODES. 



2. Tetrarhynchus bisuicatus Linton. 



1902. — July 25, 12 scolices with fragments of strobiles. 



.:. Syribolhrium JUicolle Linton. 



11(02. — July 25, 1 scolex; posterior end behind contractile bulbs somewhat macerated. One mature 

 segment, 7 mm. long, and 2 broad, with dark-brown ova. 



