PARASITKS OP FISHES OF BEAUFORT, NORTH CAROLINA. 371 



ICANTHOCEPHALA. 



I. Echinorhynchus sagitlifer Linton. [Figs. 1-7.] 



L901.— Aug. 3, 3, adult, in intestine. This is the- first find of the adult of this species. Immature 

 specimens from the body cavity of many different hosts have been found, and upon such material the 

 species was based. 



When these adult specimens were lirst seen they were collapsed, flattened, ami much crumpled, 

 except at the posterior end, which for about 5 mm. was not transversely wrinkled, and, on account of 

 its shape, suggested the head of a Dibothrium. Indeed, the worm at lirst sight might very easily be 

 mistaken for a cestode. The resemblance is heightened by the shelf-like projections with dentigerous 

 edges, which recur at rather regular intervals on the anterior half of the body, and of which 23 were 

 counted in one individual, the last one, however, being rudimentary. These projections give to the 

 worm a decidedly segmented appearance. The anterior I are s what crowded. 



A specimen placed in fresh water plumped up after the manner of most of the Echinorhynchi 

 when so treated, and afterwards transferred to killing fluid, measured 70 mm. in length. This was a 

 female; another female measured 40 mm. and a male 23 mm. in length. 



1001. — Aug. S, 1 young and 5 adults found in the pyloric cava. 



Details of tin' anatomy of a male are shown in figs. 1-4. 



NEMATODES. 



2. Ascaris inguies Linton. 



1901. — Aug. 3, '-', young. Aug. s, 2 large, small. Aug. 12, 3; 1 of them a male with very long 

 spicules. 



i ESTODES. 



:;. Scolea polymorphic Rudolphi. 



looi'.— Aug. 14, 1, small. 



4. Rhinebothrium, near R. flexile. 



1901. — Aug. 3, many, in blastocysts. These were found in the alimentary canal. Tt is not at all 

 likely that this fish is the final host. This larval Rhinebothrium is identical with the one found in the 

 toad-fish. 



5. Cysts. 



1901. — Aug. 1, a few cysts found in the stomach wall; contained white, granular material, but no 

 entozoa. 



6. Rhynchobothrium sp. 



This appears to be the kind referred to in this paper as small with relatively long hooks. (See 

 introduction.) 



1902. — Aug. 8, several small scolices, with blastocysts attached. Dimensions, life, in millimeters: 

 Length 0.8; head, length 0.14, breadth 0.22; neck, length 0.40, breadth 0.15; length of body back of 

 bulbs 0.38; diameter of proboscis, excluding hooks, 0.018; length of longest, hooks 0.014. 



7. Telrarhynchus bisulcatus Linton. 



1902. — Aug. S, few, from cysts in stomach wall. 



TREMATODE8. 



8. Distomum monticellii Linton. [Fig. 154.] 



1001. — Aug. 1, 3, very active, the neck especially so, being filiform when fully extended and capable 

 of speedily shortening until the oral and ventral suckers almost touch each other; color pale red. 

 Length, when compressed, 5 mm.; ova 0.023 by 0.017 mm. in the two principal diameters. Aug. 3, 

 2; length 2 mm.; diameter of oral sucker 0.14 mm., pharynx 0.07 mm., ventral sucker 0.35 mm.; ova 

 as in foregoing. 



1902. — Aug. 8, 6, length 4.2 mm.; I smaller, 1.2 i 



9. Distomum imparispine, sp. nov. [Figs. 180-194.] 



Body elongate, of nearly uniform breadth throughout, narrowing somewhat at the neck and for 

 a short distance behind ventral sucker. Neck and anterior part of body armed with spines, which 

 are sagittate on the ventral side of the neck, slender and curved on the lateral margins of the neck, 

 somewhat irregular on dorsal side of body, and disappear altogether about the posterior third. Mouth 



