PARASITES OF FISHES OF BEAUFORT, NORTH CAROLINA. 377 



ACANTHOCEFH \I, \. 



1. Echinorhynchus pristis Rudolphi. 



1901.— July 20, 7. July 27, 1. July MO. 5. July 31, few and small. Aug. 6, few ami small. 

 Aug. 7, fragment of female. Aug. 28, l. fragment. 



1902.— July 10, 2. July 25, 2. July 31, -V Aug. 11, 4. Aug. IS, 1. 



2. Echinorhynchus sagittifer Linton. 



1901. — Aug. 0, 1, from mesentery. 



NEMATODES. 



3. Immature nematodes (Ascaris). 



1001. — July 27. This is the type characterized in this paper as possessing a diverticulum on both 

 intestine and oesophagus. A few cysts found July 20, 1901, although containing nothing recognizable, 

 were probably due to these nematodes. Aug. 0, nematodes, same type as those found on July 27. 

 Aug. 7, several cysts from mesentery and serous coat of stomach containing degenerate, waxy tissue; 

 no entozoa found in them, hut they are probably due to these nematodes. Aug. 28, same type as of 

 July 27. The diverticulum of the oesophagus was elongated and slender. In the larger specimens 

 the intestine was dark brown. 



1992. — July 19, 25, Ml, Aug. 12, few on each date. 



CESTODES. 



I. Scolex polymorphous Rudolphi. 



1991. — Aug. 31, few, in intestine, with two red pigment spots and simple bothria. 



1902. — July 14, 1, active, 2 costse, no red pigment. July 15, ordinary type, also minuce forms. 

 Aug. is, few, large. Aug. 29 and 21, few. small. 



5. Rhyncliobothrium sp. [Fig. 98.] 



Hooks suggest R. plicatum sp. nov. 



1991. — July 12, cysts containing type with elongated neck and proboscides armed with small, but 

 not minute, hooks. July 17, several, encysted on viscera. Diameter of proboscis, including hooks, 

 O.017 mm. 



1902.— Aug. 20, 1. 



See No. 9, under Bairdiella. 



(>. Rhynchobothrium sp. 



1901.— July 17, cysts containing small larva' of the type recorded in field notes as being small with 

 relatively long hooks and bulbs. July 27, small, encysted. Aug. 17 anil 28, small oval cysts on 

 viscera. 



1902.— July 25 and Ml, few, small oval cysts. 



7. Rhynchobothrium sp. 



1901. —Aug. 31, larvae from blastocyst. Tins is the type recorded in these notes as slender with 

 very long proboscides armed with very minute hooks. 



8. Otobothrium crenacolle Linton. [Fig. 110.] 



1901. — Aug. 6, cyst with two blastocysts, each with a larva. Upon compressing the cyst the larva- 

 could lie made out through the transparent walls to belong to this species. Diameter of cyst 2 mm. 



9. Tetrarhynchus bisulcatus Linton. 



1901.— July 31, few. Aug. 28 and 30, scolices encysted in stomach wall. 



10. Synbothrium sp. See introduction. 



1901. — July 11, 1, cestode larva, which is probably to be referred to this species. The cyst was 

 found in the liver, and measured 25 mm. in length and 3 mm. in diameter. The blastocyst was about 

 the same size as the enveloping cyst and was very active. When flattened, marginal sinuous vessels 

 were seen, but no appearance of a larva. The killed specimen measured 14 mm. in length. July 12, 

 a cyst similar to the foregoing found on this date yielded a larva which appears to belong to this species. 

 Dimensions in millimeters: Length 6; breadth of head, 1.2; diameter of neck, 0.6; length of contractile 

 bulbs 1, diameter 0.27; diameter of proboscis, exclusive of hooks, I). 1 ; specimen somewhat compressed. 



