Much of the material has been placed at the disposal of 

 the writer by the Laboratory of Comparative Pathology 

 of the Philadelphia Zaological Gardens, the specimens 

 having for the most part been obtained at autopsy of animals 

 which have died in the Gardens during the service of Dr. 

 C. Y. White as pathologist, or of Dr. Herbert Fox, his 

 successor. A number were collected by Dr. J. J. Repp, in 

 Iowa; others were obtained from the hospital of the Veteri- 

 nary Department of this university; and the remainder, 

 mainly parasites from the human body or from laboratory 

 experiment animals, have been referred by various physicians 

 or were collected by the writer. The list includes studies 

 made since 1903, but is by no means a complete one, as in 

 the early part of the intervening period such parasitological 

 studies were not recorded save occasionally, and since then 

 often no record has been made of common and well-known 

 specimens. The numbers in brackets refer to the accession 

 books of the laboratory (''Path. Hist.,-") or museum 

 ("Path. Mus., -"); and, when known, the number of 

 the host in the records of the laboratory of the Zoological 

 Gardens ("P. Z. G. Lab., ") is also indicated to facilitate 

 reference. 



A. VEKMES. 



I. Trematodes. 



1. Echinostoma ferox, Rudolphi (Path. Hist., 1110), from 

 the small intestine of a stork, Ciconia ciconia (P. Z. G. Lab., 

 805). The entire small intestine was invaded, the para- 

 sites being quite numerous. The heads of the flukes were 

 embedded in the wall of the gut in small cavities, the tissue 

 about which was swollen and the seat of marked inflamma- 

 tory reaction, the lesions protruding on the serous side of the 

 wall like miliary tubercles. This mode of attachment 

 varies from that usually stated, which would have the worm 

 attached by its ventral sucker to the interior of the small 



