PARASITES OF FISHES «>F BEAUFORT, NORTH CAROLINA. 



363 



NEM VTODES. 



1. Immature nematodes (Ascaris). On viscei"a. 



Type with short diverticulum of intestine and corrugated post-anal region. 



CESTODES. 



2. t 'estode blastocysts. 



Two from outside of viscera, vase-shaped. 

 ;'.. Rhynchobothrium sp. 



Two larvae from cysts on viscera; ueck elongated; bothria emarginate with elevated border; 

 proboscides not seen everted, but long; sheaths in close spiral when ueck is at rest. Dimensions in 

 millimeters, specimen mounted in glycerine: Length of bothriutn 0.36, breadth 0.42; diameter of neck 

 0.31, length of neck 2.4; length of part behind bulbs 0.68; length of longest 1 ks 0.021. 



Sec No. •'! under Hexanematichlhys. 

 4. Otobothrium crenacolli Linton. [Fig. 111.] 



Enormous numbers of small cysts in walls of stomach and intestine, for the must pari cm the 

 submucosa. Some of the cysts were amber colored and tilled with waxy, degenerate tissue; others 

 contained blastocysts which contained no identifiable embryo, while others contained larva- which 

 could be identified through the wall of the enclosing blastocyst. One of the latter in life and under 

 slight pressure had the following dimensions, in millimeters: Length of blastocyst 1, diameter 0.8; 

 length of larva 0.32, of bothrium 0.16, breadth of bothrium 0.12. One amber-colored, oval, thick- 

 walled cyst was 1.54 by 1.09, the blastocyst 0.52 by 0.28; length of larva 0.28. 

 .">. Tetrarhynchus bisulcatus Linton. 



A few scolices were found in the material collected from this lish. It is likely that many of the 

 cysts in the stomach and intestinal walls belong to this species. The hooks on the proboscides are 

 shorter than is the rule in this species, but the number, shape, and arrangement are in agreement with 

 the usual type. Diameter of proboscis, excluding hooks, 0.034, including hooks 0.04-1; length of 

 hooks 0.01 mm. 



t!. Synbothrium filicolle Linton. 



Numerous on viscera; type with small, slender, recurved hooks; elongated blastocysts in 

 brownish cysts. 



TREMATODES. 



7. Distomum monliceUii Linton. 



One. Genital organs very indistinct. The stained specimen has a faint indication of lobed organs, 

 apparently the vitellaria near the posterior end. Measurements of living specimen under slight pres- 

 sure, in millimeters: Length 2; maximum breadth 0.52; oral sucker, length 0.09, breadth 0.01 I ; pharynx, 

 length 0.05, breadth o.oii; ventral sucker, length 0.26, breadth 0.27; ovum 0.017 by 0.010 in the two 

 principal diameters. 



8. Gasterostomum arcuatum Linton. [Fig. 235.] 



Fifteen. These specimens resemble this species, although no spines were seen. They were not. 

 in good condition when found. At the anterior end there is a knob like projection of the anterior 

 sucker; vitellaria agree in number and position, but are si nailer. Dimensions of specimen in sea- water, 

 pressure of cover glass, in millimeters: Length 4.2; diameter 0.26, of anterior projection 0.11; length 

 of cirrus pouch 0.63; ovum 0.020 by 0.014. Diameter of pharynx in another specimen 0.05. 



Seriola lalandi. Amber Jack. 



This specimen was taken on Aug. 21 by the Fisheries steamer Fish Hawk, about 28 miles off ('ape 

 Lookout, North Carolina. The viscera were placed in formalin and brought into the laboratory on 

 the 22d. The material was looked over on the 23d. 



