ON A NEW AVIAN LIVEK-FLUKE. 87 



ft. A Now Liver-Fluke [Platynosomum acuminatum) from 

 the Kestrel. By William NTicoll, M.A., D.Sc, M.D., 

 P.Z.8. 



[Received September 4, 1914: Read February 9, 1916.] 



(Text-figure 1.) 



Ijtdex. 



GboGBAPHIOAI/ ZoOLO&X : l'age 



Scotland, West Coast ; Kcstrcd (Cerrhucis Ihnuuirvlux). 

 New Liver-fluke 87 



Systematic Ziihi.oii v : 

 Family Dicrocoeliidae. 



flati/wmomuni ttrtnniiuitnni, s|). n. 



From the liver of a Kestrel 87 



In January 1912 I received from Mr. J. 8. Dunkerley, of the 

 Zoological Department, Glasgow University, a single fluke from 

 the liver of a kestrel (Cerchjieis tvn/n/uncul/us), shot on the west 

 coast of Scotland. It appears to represent a new species of 

 the genus Platynosomum Looss, and for it I propose the name 

 'Platynosomum acwn inatum. 



In a note accompanying the specimen Mr. Dunkerley observed 

 and tli;i,t the punisite was found in the gut, but there can be little 

 question that it must have wandered there from the liver. 



The specimen when received hud been stained and mounter], 

 was somewhat twisted in the course of preparation. Its total 

 length is 6*3 mm., and its maximum breadth, just behind the ven 

 tral sucker, is 1'5 mm. The body is broadest at its middle part, 

 and both the head and tail ends are markedly attenuated. 



The oral sucker, which is twisted to the right, is rather deep 

 and measures *45 x *40 mm . The globular ventral sucker measures 

 •6x'75 mm. and is situated 1*97 mm. from the anterior end. The 

 pharynx is contiguous with the oral sucker and measures T7x 

 •15 mm. There is a short oesophagus, '25 mm. in length, and 

 the intestinal diverticula are long and narrow, their ends being 

 lost in the folds of the uterus. 



The genital aperture lies over the pharynx, and, like the oral 

 sucker, is twisted to the right. The cirrus-pouch is comparatively 

 large, measuring -7xT6 mm. It contains ji thin convoluted 

 vesicula seminalis, a pars prostatic^ of medium length, and a 

 rather longer ductus. The cirrus was slightly extruded. 



The testes lie symmetrically, immediately behind the ventral 

 sucker and separated from each other by nearly half the width of 

 the body. They are oblong-oval in outline with their long axes 

 obliquely transverse. They measure about -25 x '36 mm. 



A short distance behind the left testis lies the transversely oval 

 ovary, which is somewhat smaller than either of the testes. The 



