PARASITES OF FISHES OF BEAUFORT, NORTH CAROLINA. 



349 



NEM MODES. 



1. Immature nematodes. 



1902. — .luly 7, 1. The imly entozoan found in the two rays examined on this 'lato was an exceed- 

 ingly minute nematode in the intestine. It was doubtless introduced with food, and can not lie counted 

 as a proper guesl of the ray. Length 1.3; lengtb of oesophagus 0.32; length of postanal region 0.19; 

 diameter 0.045. 



I I STI >IIKS. 



2. Sf,il,:r pnhiniorjihti.1 Rudolphi. 



liiul.— .Inly 31, few and small, in alimentary canal. 

 ;;. Acanihobothriwm paulum Linton. [Fig. 128.] 



1901. — July 12, 3, small, about 5 mm. in length; free segment 1.47; cirrus 0.38, long and spinose. 

 July 31, 4; strobiles when subjected to slight pressure became moniliform and the posterior segments 

 separated. Length of one 3.6 mm., length of last segment 0.45 mm. Aug. 1, 3. 



1902. — July IS, 1 scolex and a few fragments, not in good condition. July 22, several. Aug. 20, 

 2 and several loose segments. Aug. 21, 5 and a few loose segments. Length of one 6; length of pos- 

 terior segment 1.12; breadth 0.3, varying with different states of contraction. Reproductive cloaca at 

 posterior fourth; neck distinct. About 20 distinct segments were counted in the longest specimen; 

 the first 10 of these \\ ere short, the remainder were more or less elongated. A free segment, length 1.5, 

 breadth 0.6 ( compressed) had the reproductive cloaca 0.2 from the posterior end. 



4. Rhynchobothrium sp. 



1901. — Aug. 1, 3 small oval cysts outside of stomach wall. 



5. Synbothrium filicolle Linton. 



1901. — July 9. The only entozoa observed in the ray examined on this date were a few cysts on 

 the viscera, from one of which a species of Synbothrium was liberated. Type with slender straightish 

 hooks on proboscides. 



1902. — July 29, 1, with beginning segments, small. The segments were slender and immature. 

 Aug. 19, 1, not in good condition; scolex with blastocyst attached. Although these specimens were 

 obtained from the intestine of the ray, it is doubtful whether the butterfly ray is the proper final host of 

 Synbothrium. 



TREMATODES. 



i;. Distomum sp. [Fig. 210.] 



1902. — July IS, 1, immature in cyst. Dimensions, life, in millimeters; Length 1.35; breadth, 

 anterior 0.18, at ventral sucker 0.3S, near posterior end 0.53; diameter of oral sucker 0.S, of ventral 

 sucker 0.12, of pharynx 0.12. Probably introduced with food, and the cyst yields more slowly to the 

 digestive fluids than do the tissues in which it was embedded. 



This is probably the young of D. tenue, or an allied species. 



Galeichthys milberti, Sea ' at-fish. 



