PARASITES <»F FISHES OF BEAUFORT, NORTH CAROLINA. 



355 



mature; intestine slender and not traceable in places, extending into appendix; intestines of others 

 voluminous. Aug. 16, several. Aug. 19, 9 large, I small, immature. Aug. 20, numerous. Aug. 25, 10. 



The specimen collected in 1901 was without ova; the two vitellaria had each three blunt digitate 

 lobes; the intestine was yello« ■ excretory vessels dark by transmitted light, opaque white by reflected 

 light. 

 ,s. Distomum tornatum Rudolphi. 



1902. — Aug. H>, 1 and fragments; fragments of large, thick distomes, intestine dark brown and 



extending into posterior em 1; ovaO.018 byO.011 nun. Aug. 25, 9, larger s 10 nun. in length, reddish 



flesh color. Aug. 16, 19, few mi each date. 



Fundulus majalis, Killi-fish, Hock-fish. 



\e iNTHOCEPHALA. 



I. Echinorhynchus prktis Rudolphi. 



1902.— Aug. 7, 1 small male. 



NEMATODES. 



'J. Immature nematodes {Ascaris) 



Type with diverticulum <>n both intestine and oesophagus. 

 1902.— Aug. 7, few. 



CESTODES. 



:;. Txniasp. (encysted). [Figs. 85, 86.] 



This is the encysted stage of a form whose adult stage will be found in some species of fish-eating 

 bird. 



The cysts are white and occur for the most part on the mesentery. When these were opened 

 elongated larva' were liberated, in most of which the characteristic foursuckers and rostellum with its 

 crown of hooks were found to be developed. In all cases the suckers and rostellum were invaginated, 

 but could be seen plainly when the larva was flattened and viewed with transmitted light. 



Dimensions of larva, life, moderately c pressed, in millimeters: Length 5.5; breadth at anterior 



end 0.75, from whence the body tapers to the posterior end; sucker, length 0. Hi, breadth (1. 15; length 

 of invaginated head 0.9; length of rostellum, measured from actual anterior edge of sucker, 0.33; 

 length of hooks 0.22. 



Two scolices were obtained from one of flu- larger cysts; one of these had a constriction just back 

 of the anterior end. In this one neither suckers nor rostellum had yet developed. The longitudinal 

 vessels wen- conspicuous and the parenchyma was coarsely granular from the presence of calcareous 

 bodies. 



The cysts are soft and white and contain a whitish granular semifluid material, which is not 

 unlike parenchyma and surrounds the larva. They are in this particular like the cysts found by the 

 author in Salmo mykiss, containing larva? of Dibothrium cordiceps (Bull. 1'. S. Fish Commission for 

 1889). Sections show these cysts to have rather thick walls composed of somewhat loose connective 

 tissue. The larva- lay at one side of the cavity closely adherent to the wall of the cyst. The cavity of 



the cyst sectioned contained also small masses of c lective tissue, which were evidently derived 



from the wall of the cyst. 



July 7. S, ll«, 21, and 23, a few found on each date. Il has seemed best to u-c the old and more 

 c prehensive generic name for these immature worms. 



