TREMATODES OF AUSTRALIAN BIRDS. 259 



44. Osborn, H. L. — On the structure of Clinoslomum marginatum, 



a trematode parasite of the frog, bass and heron. Journ. 

 Morph., xxin, p. 189, 1912. 



45. Pratt, H. S. — Synopsis of North American Vertebrates XII. 



The Trematodes. American Naturalist, xxxvi, 1902. 



46. Stiles and Hassall. — Index Catalogue of Medical and Yet. 



Zoology: Trematoda and trematode diseases. Hygiene 

 Lab. Bull. No. 37. Washington, 1908. 



47. Stossich. — Una nuova specie del genere Plagiorchis Liihe. 



Annuar. Mus. Zool. Univ. Napoli, Nuova Serie, I, No. 16. 



48. Ward, H. B. — On the structure of the copulatory organs in 



Microphallus. Univ. Nebraska Zool. Studies No. 43, 1901. 



EXPLANATION OF PLATES. 



The drawings which were made by Mr. W. F. Atkins of the 



Technical High School, Sydney, were all done with the help of 



the camera lucida. 



Reference Letters. 



c. g. Cerebral ganglion 0. Ovary 



c. s. Cirrus sac. 0. d. Oviduct 



4. Cirrus P. Penis 



Ej. d. Ejaculatory duct Ph. Pharynx 



E. Excretory vessel Pr. Prostate 



Ex. p. Excretory pore R. s. Receptaculum seminis 



Ex. v. Excretory vesicle R. s. u. Receptaculum seminis 



F. G. Flame cell uterinum 

 G.p. Genital pore S. g. "Shell-gland" 



G. S. Genital sinus T. Testis 

 Int. Intestinal limbs Ut. Uterus 



L. c. Laurer's canal Fa#. Vagina or metraterm 



L. t. Lateral nerve-trunk v. d. Vas deferens 



M. 0. Mouth-opening v. s. Vesicula seminalis 



N. Nervous system v. sk. Ventral sucker 



JV. t. Nerve trunk y. d. Yolk-duct 



(Es. (Esophagus y. g. Yolk-glands 



O. S. Oral Sucker y. r. Yolk-reservoir 



