Oken, C. and Eysenhardt. 



1821. Ueber Peiinella diodontis . Nova Acta Acad. Caes. Leopold. 

 Bonn, vol. 10, 350. (Also published in Actes nouv. Acad. 

 Curieux Nature , vol . 10 , pt . 2 . 



Oken, L. 



1816. Lehrbuch der Naturgeschichte. Dritter Theil, Zollogie. 

 2 vols. Svo., Jena, with atlas. 



Olsson, P. 



1867. Entozoa, iakttagua hos Skandineviska hafsfiskar. I. 

 Platyelmlnthes . Lund's Universitets Arsskrift, 3: 113. 



1876. Bidrag tiU Skandinaviens Helminthfauna . I. Kongliga 

 Svenska Vetenskaps Akademiens nya Handlingar, 14, (1): 

 6-35. 



1893. Bidrag tUl Skandanaviens Helminthfauna. II. (Konglia 

 Avenska Vetenskaps Akademiens nya Handlingar, 25: (12) 



1896. Sur Chimera monstrosa et ses parasites. Mem. Soc. 

 Zool. France, 9: 499-512. 



Oppianus, O. 



120 A . D. On Fishing. (States that the tunny & swordfish are 

 frequently killed by parasites). Alieutlcon:sive 

 de piscebus — 



Orley, L. 



1885. A Czapaknak es Rajaknak Belfergei (Die Entozoen der 

 Haien und Rochen). Term, fuzetek, 9: 97-126; 216-220. 



Orley, Ladislaus and F . Jeffrey Bell 



1884. Note on some parasites of fishes from Madres . Ann. 

 and Mag. of Nat. Hist. London. 5th series, 13: 173-175. 



Ormerod, E. A. 



1878. Ranatra Linearis . Entomologist, 11: 119-120. 



Osbom, H. L. 



1902. Notes on the Trematodes of Lake Chautauqa. Science, 

 new series, 15: 573-574. 



1903. Bunodera comuta sp. n. A new parasite from the 

 crayfish and certain fishes of Lake Chautauqua, N.Y. 

 Biol. Bull., V: 63-73. 



1910. On the structure of Cryptogonimus chyll , an aberrant 

 Distome, from fishes of Michigan and New York, Jour. 

 Exp. Zool. Philadelphia, 9: 517-536. 



(Crustacea) 



(Crustacea) 



(Helmhithes) 



(Helminthes) 

 (Helminthes) 

 (Crustacea) 



(Crustacea) 



(Helminthes) 



(General) 

 (Predation) 



(Trematoda:Digenea) 



(Trematoda: Digenea) 



(Trematoda: Digenea 



58 



