622 W. S. NICKERSON, 



Olsson, P., 96, Sui" Chimaera monstrosa et ses parasites, in: Mein. Soc. 



zool. France, V. 9. 

 OsBORN, H. L., '98, Observations on the anatomy of a species of Platy- 



aspis found parasitic on the Unionidae of Lake Chatangua, in : 



Zool. Bull., V. 2. 

 PoiRiER, J,, '86, Trematodes nouveaux ou peu connus, in : Bull. Soc. 



philom. Paris, (ser. 7) V. 10. 

 Pratt, H. S., '98, A contribution to the life history and anatomy of 



the appendiculate Distomes, in: Zool. .Jahrb., V. 11, Anat. 

 Stafford, J., '96 , Anatomical strueture of Aspidogaster conchicola, 



ibid. V. 9, Anat. 

 VoBLTZKOW, A., '88, Aspidogaster conchicola, in : Arb. zool.-zoot. Inst. 



Würzburg, V. 8. 

 — , '88a, Aspidogaster limacoides, ibid. 



