TREMATODES OF AUSTRALIAN BIRDS. 205 



Type specimen in the Australian Museum, Sydney, No. 

 W. 430. 



A single specimen of this worm was obtained by Dr. 

 Harvey Johnston from the gizzard of Micrceca fascinans 

 at the Burnett River. It is a small worm 5*75 mm. long 

 by 0*523 mm. broad. The body was twisted through a 

 right angle just behind the ventral sucker, so that in figure 

 8, while the anterior end is viewed from the side, the 

 posterior part is viewed from the ventral surface. 



The head-collar is well developed and is armed by twenty- 

 three collar-spines arranged in a double row, but the two 

 rows are set very nearly together so that without very 

 close inspection they appear to be arranged in one row. 

 These spines measure 0*069 X 0*021 mm. In addition, 

 there is a group of three large spines on each ventral angle 

 of the collar, set in a direction very nearly at right angles 

 to those of the edge of the collar. For the greater part of 

 its length the body exhibits a fairly even breadth, but 

 gradually becomes narrowed to a blunt point at the posterior 

 end. The integument in the anterior part of the body is 

 armed with sharp spines. These spines are very numerous 

 in front of the ventral sucker : from this on to the region 

 of the testes they become more scattered and further back 

 vanish completely. The ventral part of the body in front 

 of the ventral sucker is deeply concave, and into this hollow 

 the ventral sucker projects very prominently (fig. 9). 



The ventral sucker is 0*62 mm. long, and lies nearer the 

 anterior end than in the other species of Echinoparyphium. 

 The oral sucker is spherical and 0*106 mm. in diameter : so 

 that the ratio of the oral to the ventral sucker is 1 : 6. The 

 fork of the intestine lies just anterior to the ventral sucker 

 and immediately behind it lies the genital pore. The com- 

 parative! y large cirrus sac extends nearly to the middle of 

 the sucker. 



