298 ILLINOIS ACADEMY OF SCIENCE 



while in the Anura, this ventral portion is as clearly 

 pterygoid. 



The basal part of the antorbital process in Crypto- 

 branchus, and possibly in all Urodeles is derived from the 

 pterygoquadrate arch, and is homologous with the anter- 

 ior part of this arch in the Annra. 



BIBLIOGRAPHY 



Gaupp, E. 



1893. Beitrage zur Morphologie des Schadels. Primordial-cran- 

 ium und Kieferbogen von Rana fusca. Morph. Arbeiten, 

 2:275-480, 4pl. 



Parker, W. K. 



1876. On the structure and development of the skull in the Uro- 



delous Amphibia. Trans. Zool. Soc, London, 11:171-214. 

 1881. On the structure and development of the skull in the Ba- 

 trachia. Phil. Trans. Roy. Soc. London, 172:266, 44pl. 



Terry, R. J. 



1906. The nasal skeleton of Amblystoma punctatum. Trans. Acad. 

 Science, St. Louis, 16:95-124, 4pl. 

 Wiedersheim, R. 



1877. Das Kopfskelet der Urodelen. Morph. Jahrb., 3:352-448; 



459-548. 

 Winslow, Guy M. 



1898. The chondrocranium in the Ichthyopsida. Tufts Coll. Stud- 

 ies, 1:147-201, 4pl. 



CNIDOSPORIDIA IN THE VICINITY OF URBANA^ 



R. Kudo, Univeesity of Illinois 



The writer has been studying, for some time, Cnidos- 

 poridian parasites of fishes and insects from the vicin- 

 ity of Urbana, 111. The object of this study is to deter- 

 mine: 1) what forms do occur in this locality; 2) to what 

 extent is the infection carried on; and 3) what is the 

 effect of infection upon the host body. The study is still 

 under way ; the brief summary of the results obtained up 

 to the present will be stated in the following pages. 



1 Contributions from the Zoological Laboratory of the University of Illi- 

 nois, No. 164. 



