TREMATODES OF AUSTRALIAN BIRDS. 201 



It is larger, being more than twice as long and twice as 

 broad. The relative size of the head-collar is very differ- 

 ent, for while it is as wide as the body in its widest part 

 in A. phoenicopteri it is only half as wide in the Australian 

 form. 



In regard to the suckers, again, while the diameter of 

 the ventral sucker in the latter is three and a half times 

 as great as that of the oral sucker, in the former it is only 

 twice as great, and is situated much farther back in the 

 body. Though Dietz, in his account of the African 

 species (13> pp * 365 " 8) makes no mention of the spines on the 

 cirrus, I have no doubt that they will be found to be present 

 if they are looked for in a series of longitudinal sections. 



ECHINOPARYPHIUM OXYURUM, Sp. n. (Pig. 6.) 



Diagnosis. — Small worms, 5*8 mm., long with a well 

 developed head-collar, and a very distinct sharp- pointed 

 tail. Collar spines long. Integument armed with trans- 

 verse rows of rounded scales. Ratio of oral to ventral 

 sucker 1 : 4. Testes in the middle of the body. Eggs 

 0'096 - 0*107 mm. long by 0*054 - 0*08 mm. broad. 



Host. — Herodias timoriensis, in the intestine. 



Type specimen in the Australian Museum, Sydney, No. 

 W. 429. 



Four individuals of this species were sent me by Dr. 

 Harvey Johnston, who obtained them from the intestine of 

 an Egret, Herodias timoriensis, shot on the Burnett River 

 in Queensland. They are all about the same length, 5*8 mm., 

 and attain a maximum width at the ventral sucker of 

 0*698 mm. From the region of the testes the sides of the 

 body, which is fairly flat, run parallel to a level near the 

 posterior end when they converge in such a way as to form 

 u distinct, sharp-pointed tail, which seems to be a very 

 characteristic feature. The intestinal limbs and the yolk- 



