PARASITES OF PISHES <>!•' KKW'FORT, NORTH CAROLINA. 



373 



CEST 3. 



6. Rhynchobothrium speciosum Linton. 



( me larva from cyst in stomach wall; another blastocyst without distinguishable larva may belong 

 to a different species. 



7. Otobothrium crenacolie Linton. 



Very numerous, encysted in submucous coat of stomach. 



8. Tetrarhynchus bicolor Bartels. 



Two from cyst in stomach wall. The cyst was globular and of a greenish hue. 



TREMATODES. 



9. Distomum tornatum Rudolphi. 



Very numerous, for the most part in the stomach; (171 were collected. There was great variation 

 in size, one of the smallest measuring •". mm. and one of the largest 1- nun. in length. The lish had 

 been dead for about thirty-six hours, during the greater part of which time it had been kept on ice. 

 The worms were dead, but were apparently in good condition. The color was white except where the 

 folds of the uterus lay, where the color varied from pale yellow to orange. The cirrus was seen extruded 

 in several cases and was noted to be distinctly nodular. 



10. Distomum monticellii Linton. 

 Four; length 2.5 mm. 



1 1 . Distomum ti nui Linton. 



Forty-two; elongated, slender, white. These are without oral spines and the bodies of most are 

 smooth. In a few cases spines were seen on the neck — faintly on some, more plainly on others. Head 

 and neck of many macerated. Cirrus extended in some cases, when it was seen to be relatively stout 

 and smooth. These specimens hear a close resemblance to Distomum sp. from Enche.lyopus cimbrius ( see 

 Parasites of Fishes of Woods Hole Region, fig. 330), which may be a specimen of I), tonic from which 

 the oral spines have fallen away. 



Dimensions of specimen with elongated neck, in millimeters: Length 7.5; diameter, al oral sucker 

 0.21, at pharynx 0.51, at ventral sucker 0.6, from which point the diameter is nearly uniform to the 

 posterior end; diameter of oral sucker (I. IS, of pharynx 0. Is, of ventral sucker 0.27; length of pharynx 

 0.2; distance of pharynx from anterior end 1.05; distance of ventral sucker from anterior end 2.25; 

 ova 0.076 by 0.043. Another specimen with contracted neck measured 5 nun. in length; distance of 

 pharynx from anterior end 0.3 mm.; distance of ventral sucker from anterior end 0.75 mm. The ova 

 were undergoing segmentation. 



12. Distomum sp. [Figs. 213. 214.] 



Three, with extraordinarily voluminous intestines which obscure other organs. Same as No. 10 

 under Coryphxna equisetis. 



Dimensions, in millimeters, slightly compressed: Length 3.35; diameter, anterior 0.11, at ventral 

 sucker 0.33, nearly uniform to posterior end; oral sucker, length 0.10, breadth 0.08; ventral sucker, 

 circular, 0.24 in diameter. 



These specimens are immature. There is no pharynx. The (.esophagus is slender. The intestinal 

 rami begin in a convoluted mass slightly in front of the ventral sucker, and continue to the posterior 

 end, being voluminous, and apparently irregularly constricted, so as to present the appearance of a 

 series of translucent bodies tilling the post-acetabular region of the body. The intestines are filled 

 with structureless, seemingly colloid material. No trace of genitalia could be made out in any of these 

 distomes. 



While they are immature, there should be no difficulty experienced in recognizing these peculiar 

 forms. 



Coryphasna equisetis, Small Dolphin. 



