PARASITES OF FISHES OF BEAUFORT, NORTH CAROLINA. 381 



two principal diameters; embryos 0.068 and 0.017 in length and breadth respectively. The body was 

 slender fusiform, tapering from 0.53 mm. at near anterior end to 0.35 mm. at the middle and 0.25 mm. 

 near posterior end. The anterior end was inverted, but was seen to be rather abruptly tapering to 

 proboscis and armed near the proboscis with sagittate spines; a few scattering sagittate spines also on 

 the unin'verted anterior end of the body. Base of proboscis armed with a circle of about L2 relatively 

 long and but slightly recurved hooks; anterior to this circle about lti vertical rows of small, blunt 

 hooks, about in each row; anterior to these, the hooks are arranged in the ordinary spirals, the basal 

 for a short distance short, stout, and recurved, the remainder, so far as seen, of usual type, viz., stout 

 and recurved on one side of the proboscis, and slender, straightish on the other; about s hooks 

 visible in a single spiral. Proboscis nearly at right angles to axis of body. 

 l'. EcMnorhynchus sagictifer Linton. 



1901. — Aug. 22, encapsuled on viscera. 



NEMATODES. 



3. Immature nematodes (Ascaruep.). 



1901. — Aug. 20, 21, 24, few, from body cavity on viscera. These belong to the kind characterized 

 in this paper as having diverticula of oesophagus and corrugated post-anal region. (Type shown in 

 fig. 31.) 



CESTODES. 



t. Scolexpolymorph.ua Rudolphi. 



1901. — July 16, few in intestine. Aug. 5, few. Aug. 10, 1. Aug. 20, few; red pigment spot noted. 

 Aug. 21, few; two red spots noted in these. Aug. 23, few. Aug. 27, few. All of these larval cestodes 

 found in intestine. 



1902. — July 14, several minute specimens were seen in a small piece of the intestine which was 

 being examined under the compound microscope in order to ascertain the nature of the food. The 

 bothria were all retracted and evidently still rudimentary. These minute forms were of nearly 

 uniform size; length 0.14 mm.; breadth 0.06 mm. ; color yellowish-white. Other specimens were also 

 observed, which were larger and of the usual type. July 15, rather numerous, with red pigment 

 patches, but no costae on the bothria. 



5. ' 'estode blastocysts. 



1901. — July 16, 1, on viscera; no larva yet developed. Aug. 17, 1; slender, from viscera; active 

 after several hours in sea water. 



6. Rhynchobothrium sp. 



Probably encysted stage of R. longispine Linton. 



1901. — Aug. 23, 1. This appears to be the kind which is recorded in these notes as small, with 

 relatively long hooks and contractile bulbs. From cyst on viscera. 



1902. — July 7, 15, 19 and Aug. S, few. Small, oval cysts on viscera. 



7. Otobothrium crenacolle Linton. 



1902.— Aug. 24, 1 cyst with larva. 



8. Tetrarhynchus bisulcatus Linton. 



1901.— July 18, from cyst. 



TREMATODES. 



9. Distomvm monticellii Linton. 



1901. — Aug. 20, 1, from intestine. Dimensions, in millimeters, compressed: Length 4.2; diameter 

 of oral sucker 0.27, of ventral sucker 0.52, of body 0.56; ova, numerous, 0.028 and 0.014 in two prin- 

 cipal diameters. Color light red; cirrus pouch in front of ventral sucker; testes close together placed 

 somewhat diagonally and immediately behind the ventral sucker; ovary somewhat farther back, 

 followed by the lobed vitellaria; rami of intestines extend to posterior end of body. Aug. 21, 2, 

 young, 1.13 and 2 mm. in length respectively. The stained specimens show the testes, ovary. 

 vitellaria, and rudiment of cirrus pouch, all agreeing with this species. 



In each specimen in life the excretory vessel, just behind the ventral sucker and just in front of 

 it, was tilled with spherical, orange-colored concretions. These varied from very minute to 0.01 nun. 

 in diameter. 



