154 PROCEEDINGS OF THE NATIONAL MUSEUM vol.88 



border of the oral sucker. In addition to tlie uterus and vitellaria, 

 two small, deeply staining bodies, opposite each other and situated 

 at the margin, a little in front of the middle of the length of a flat- 

 tened specimen, were interpreted as the testes, and another on the 

 median line, a little back of the middle, as the ovary. No pharynx 

 can be made out satisfactorily in this specimen, although a faint in- 

 dication of one appears in the head of the female. Another speci- 

 men with a reniform massive portion containing the uterus, etc., also 

 has two protruding heads side by side. These differ considerably in 

 size. Measurements of female : Breadth at level of oral sucker, 0.18 

 mm.; oral sucker, length, 0.075 nun., breadth, 0.090 mm. Measure- 

 ments of male : Breadth at level of oral sucker, 0.06 mm. ; oral sucker, 

 length, 0.045 mm., breadth, 0.060 mm. Length of common egg- 

 containing portion, 0.70 mm., breadth, 1.12 mm. 



Eight cysts, collected by Vinal N. Edwards, September 22, 1914, 

 from pyloric caeca. These were at first taken to be pedicelled cysts, 

 but they proved to be pyloric caeca in the lumens of which the 

 trematodes were lodged. 



Four, collected June 29, 1915, encysted in the pyloric caeca, yellow ; 

 largest, length, 9 mm., breadth, 4.5 mm.; smallest, length, 3 mm., 

 breadth, 1.5 mm.; ova, 0.028 by 0.014 mm. 



WEDLIA XIPHIADOS (G. A. and W. G. MacCallum) 



KoelUkeria xiphiados (G. A. and W. G. MacCallum), Zool. Jahrb., vol. 39, pp. 

 148-153, figs. 1-5, 1916. 



Cysts from flesh behind gill cavity collected July 21, 1913. These 

 cysts came from a swordfish {Xiphias gladius), taken by Charles 

 Grinnell. The specimens had been more or less mutilated, but it was 

 possible to trace a slender tube containing blood vessels from each 

 cyst toward the gill cavity. Before this material was turned over to 

 Dr. MacCallum, who was giving special attention to trematodes on the 

 gills of fishes, a few notes were made. Upon comparing my notes 

 with the detailed description given by the MacCallums I find them in 

 agreement, with the exception of the dimensions of the ova. These 

 are stated in the description of the species to be 0.06 mm. in diameter. 

 My notes give the dimensions as 0.021 by 0.016 mm. In some ivory 

 white tubules the ova were slightly smaller than the yellow, older 

 ova. They measured 0.020 by 0.016 mm., and, so far as observed, had 

 developed to the two-celled stage. 



A short papilla, 4 mm. long and 4 by 3 mm. in diameter, was ob- 

 served on the side of one of the trematodes. It had a mouthlike 

 opening at the end and along one side. Within the papilla there 

 was a thin membrane, richly supplied with blood vessels, which ap- 

 peared to be distributed generally among the tubular genitalia of the 

 trematode. 



