474 



WILLIAM NICOLL. 



(Podocotyle) atherinae sp. inq. (Fig. 1). 



A single specimen of a species of " Podocotyle " was obtained from the 

 anterior part of the intestine of Atheriym, presbyter. I am unable to refer 

 it to any known species, and it is doubtful even if it can be included in 

 the genus Podocotyle. It is a small, somewhat flattened form measuring 

 1-1 mm. in length by -49 mm. in greatest breadth, and it is of a dark 

 grey colour in life. The outline is roughly oval with a slightly attenuated 

 neck. 



The oral sucker is globular with a diameter of '13 mm. The ventral 

 sucker is transversely oval and measures -21 X -28 mm. The latter is 



Fig. 1. — (Podocotyle) atherinae. 



Veutral view x 50. 



C. B. Cirrus-pouch; K.St. Ovary; 



P.G. Genital aperture ; R.S. Receptaculum seminis ; T. Testes. G. Roberts del. 



situated 46 mm. from the anterior end. The pharynx is contiguous with 

 the oral sucker and has a diameter of -07 mm. The oesophagus is -11 mm. 

 long, and the wide diverticula extend nearly to the posterior end of 

 the body. 



The genital aperture is on the left side a little in front of the level of 

 the intestinal bifurcation. The cirrus-pouch is long and slender, and 

 reaches to the level of the ovary. It contains a long, convoluted vesicula 

 seminalis. The ductus is simple. The testes lie near the posterior end 

 of the body. The distance between the posterior testis and the tip of 

 the tail being -13 mm. They are contiguous and obUque, the anterior 

 being on the left. Their outline is irregularly globular, and their margins 

 are entire. The posterior testis lies closely apposed to the right intestinal 

 diverticulum, while the anterior one is apposed to the left diverticulum. 

 Their greatest diameter is about -17 mm. 



