PARASITES OK FISHES OF BEAUFORT, NORTH CAROLINA. 109 



numerous. Aug. 11, 12, b>, 18, uumerous. ^.ug. 19, numerous, much waxy secretion associated with 

 the clusters. Aug. 20, 21, numerous clusters. Aug. 23, 26, small clusters of cysts. 

 See N<>. 2 under Siphostomafuscum. 



5. Rhynchobothrium tumidulum Linton. 



1901. — July 26, from cysts associated with No. 4; larvfe remaining attached to blastocysts; 

 contractile bulbs long and slender with red pigment spot at anterior end of each, length 0.56 mm.; 

 diameter 0.07 mm.; proboscides not seen extended. Aug. 27, from cysts on viscera. 



1902.— Aug. 16, I, cyst on viscera. 



6. Otobolhrium crenacolle Linton. 



1901.— Aug. 30, encysted, few. 



7. Tetrarhynchus bisulcatus Linton. 



HKll. — Aug. 20, 1 scolex from cyst. Hooks blunt; neck thicker than head. 

 1902. — July 21, 1, encysted in stomach wall. 



TEEMATODES. 



8. THstomum vitellosum Linton. 



1902. — July 16, :;. Inly 28, 2, immature. Aug. 16, few. Aug. is, . r >. Aug. 19, few. In some 

 the testes were lobed, best seen under moderate pressure; in others they were not lobed. 



9. Distomum val-de-inflatum Stossich. 



mol. — July It!, globular cysts encapsuled on viscera containing immature distome with double 

 circle of oral spines, about 24 in each circle; length of distome 1.96 mm. July 26, Aug. 2, 6, 2:;, 

 in globular cysts mi each date, associated with Xo. 4. Dimensions of a distome collected on Aug. 2. 

 in millimeters; Length. 2.38; diameter, at anterior end 0.28, at ventral sucker 0.53, near posterior 

 end 0.76, of anterior sucker 0.18, of ventral sucker 0.25, of pharynx 0.2; length of oral spines 0.048. 

 Aug. 30, few, in globular, pediceled cysts on viscera. It is to be noted that this species rests on 

 immature forms and is doubtless identical with some adult form — e. g., D. dentatum. In globular cvsts 

 on viscera associated with No. 4, frequently with yellowish secretions. 



1902.— July 14, few. July Hi, numerous. July 19, 21, several. July 26, 29, 31, few on each date. 

 Aug. Hi, numerous. Aug. 21, few. Aug. 23, 1. Aug. 26, few. 



10. Distomum aduncum sp. nov. [Figs. 195-197. ] 



Small and minutely spinose, ovate, greatest diameter near posterior end, whence it tapers to the 

 anterior end; posterior end broadly rounded. Oral sucker larger than ventral; pharynx a littlelonger 

 than wide, remote from the oral sucker; oesophagus loii'_ r ; intestinal rami simple, thick-walled, short, 

 extending but a short distance beyond the ventral sucker, which is situated a little behind the middle 

 of the body. Testes two, lateral, a short distance behind the ventral sucker. The very muscular base 

 of the cirrus pouch lies on the right side of the ventral sucker. Four stout hooks were seen at the 

 anterior end of this muscular organ [I'm. 197/i] which doubtless make a grappling copulatory armature 

 at the base of the cirrus when everted. The cirrus was not seen everted; it appeared to arch from the 

 muscular organ in front of the ventral sucker to terminate in the genital aperture. The genital aper- 

 ture is a very conspicuous organ in this species. It lies close beside the ventral sucker on the right 

 side, and is specialized into a muscular sucker, slightly larger than the ventral sucker and of similar 

 appearance. ( Ivary subglobular, adjacent to anterior edge of the left testis and to the genital sucker. 

 The vitellaria are lateral lobed masses lying immediately behind the testes. The folds of the uterus 

 are in the post-acetabular region, both behind and among the testes and vitellaria; ova numerous and 

 small. 



Dimensions in millimeters of a specimen in formalin: Length 0.7; greatest breadth 0.35; trans- 

 verse diameter of oral sucker 0.07; pharynx, length 0.04, breadth 0.03,; vedtral sucker, length 0.048, 

 breadth 0.041; genital aperture, length 6.061, breadth 0.058; ova, some variation in size, average of 

 best-formed ones 0.020 by 0.010. The largest specimen measured <) s; nun. in length and 0.38 mm. 

 in breadth. A specimen which was not observed until after it had been killed was arcuate, the ventral 

 surface being concave from side to side and from front to rear. 



1901.— Aug. 27, 4. 



1902.— Aug. 8, II, 16, 1 on each date. 



A small specimen, apparently identical with the specimens above described, was found on Aug. 15, 

 1902, in the sand snipe [Calidris arenaria ). 



