PARASITES OF FISHES OF BEATJFQBT, NORTH CAROLINA 379 



is. Distomum areolatum Rudolphi. 



I! to I. — Aug. 31, 1. A small specimen which belongs to tliis species or near it, agreeing with No. 16 

 under Wicropogon wndulalus. Dimensions in millimeters: Length 1.12; breadth 0.45; diameter of oral 

 sucker 0.14, "i pharynx 0.0S, of ventral sucker 0.09; ovum, 0.12 ami 0.08 in the principal diameters. 

 Posterior part of body filled with minute oval bodies, 7 and 4 microns in the two principal diameters. 



1902. — Aug. 11. 1 and fragment, immature. Aug. 19, few. 



19. Distomum tenue Linton. 



1901. — Aug. 30, a single specimen in close agreement with Xo. 6 under Sciienops ocellatus, found on 

 the same date, appears to belong to this species, although no spines could be made out either around 

 t lie mouth or on the body. There were indications, however, that spines had been present in both 

 situations. The intestine in front of and beside the ventral sucker was gorged w ith granular material 

 of a faint orange color; the remainder of the worm was white. Dimensions in millimeters: Length 4; 

 diameter, maximum 0.75, of oral sucker 11.19, of pharynx 0.28, of ventral sucker 0.3; distance from 

 anterior end of pharynx 0.77, of ventral sucker 1.45; ova, 0.1 1 and 0.08 in the two principal diameters. 



20. Distomum valde-inflatum Stossich. 



1901. — July 11, 1, from cyst on viscera. Dimensions in millimeters: Length 2.1; breath 1.12; 

 diameter of oral sucker 0.15, of ventral sucker 0.22; pharynx, length 0. IS, breadth, 0.14. 



21. Gasterostomum sp. (?) 



1901. — July 11, 2 small slender trematodes, in too poor condition to admit of determination, rather 

 suggest this genus. 



22. Monostomum vinal-edwardsii Linton. 

 1901.— Aug. 31, 1. 



1902.— Aug. 11, 1. 



23. Monostomum sp. [Fig. 222.] 



1901. — Aug. 28, 2, small, short oval. Dimensions in millimeters: Length 0.86; breadth 0.65; 

 diameter of oral sucker o. 14, of pharynx 0.06; ova, 0.021 and 0.014 in the two principal diameters: 

 cirrus densely spinose. This species appears to be near the small form found in Pomolobus (Bulletin 

 of L 1 . S. Fish Commission for 1899, p. 4'.','.>, tig. ."77.) Aug. 30; 2, small, oval, resemble the foregoing, 

 but the body is covered with minute spines, a feature not observed in the former lot. Aug. 31, few; 

 same as those collected on the preceding date. 



24. Monostomum sp. [Figs. 22:1-225.] 



1901. — July 30, 1, rather slender when compressed, and bearing numerous ova, which are peculiar 

 in that their longer diameter is three times the shorter. Dimensions in millimeters: Length 0.9; 

 diameter, anterior 0.15, middle 0.25, posterior 0.08; diameter of oral sucker 0.14; pharynx, length 

 0.05, breadth 0.04; diameter of genital aperture 0.08; ova, 0.03 and 0.01 in the two principal diameters. 

 Aug. 31, 1. 



1902. — July 15, several, found in pieces of the intestine with the aid of the compound microscope. 

 They are very irregular in shape and of considerable variety of size; dirty greenish-yellow by trans- 

 mitted, paler by reflected, light. Dimensions of 7 specimens chosen at random, life, length, and 

 breadth only: Length 0.30, breadth 0.24; length 0.34, breadth 0.24; length 0.18, breadth 0.15; length 

 0.15, breadth 0.13; length 0.25, breadth 0.19; length 0.30, breadth 0.18; length 0.19, breadth 0.16. 

 When compressed these specimens become uniformly long oval, larger anteriorly, tapering posteriorly, 

 and then are easily seen to be identical with the specimens taken in 1901 . 



25. Monostomum sp. [Figs. 216, 218.] 



These are slender forms which were represented by only a few specimens, which were quite 

 fragile and otherwise in poor condition, so that the anatomy revealed by them is very incomplete. 



The general shape of the body is long and slender, especially in the specimens collected on Aug. 

 11 (fig. 216). The vitellaria are represented by a number (as many as 25 in one) of subglobular 

 bodies, situated not far from the middle of the length of the body. Ova numerous, the convolutions 

 of the uterus extending to the posterior end. Oral sucker and pharynx each longer than broad, the 

 latter remote from the mouth. 



1902. — July IS, 1 (tig. 218 sketched from this specimen). Dimensions in millimeters, life, com- 

 pressed: Length 1.4, breadth 0.3; oral sucker, length 0.16, breadth 0.11; pharynx, length 0.12, 

 breadth 0.09; genital sucker 0.10; ova. o. 025 by 0.011. Aug. 11, ::. Aug. 18, 1. These were not 



