210 S. J. JOHNSTON. 



fields some distance behind the ventral sucker. In tliis 

 point, in the relative size of the testes, and in its more 

 slender habit, it differs from E. prosthovitellatus, Nicoll, 

 and jEJ. bursicola, Crepl. 



Patagifer acuminatus, sp. n. (Figs. 2 and 3.) 



Diagnosis. — Body slender, acuminate; bead collar nav- 

 roiver than body, ratio of oral to ventral sucker 1 : 5. 

 Intestinal fork lying dorsal to the ventral sucker; genital 

 pore in front of intestinal fork ; fields of the yolk glands 

 narrow, not passing inwards beyond the intestinal limbs; 

 eggs long and narrow, 0*096 x 0*043 to 0*107 x 0*048 mm. 



Host. — Ibis molucca, in the intestine, Burnett River, Q. 



Type specimen in the Australian Museum, Sydney, No. 

 W. 432. 



Nine specimens of this worm were obtained by Dr. Harvey 

 Johnston from the intestine of the White Ibis, Ibis molucca. 

 They varied in size from 7*7 x 1*012 mm. up to 10*45 x 

 1*56 mm. The body is deeply concave on the ventral sur- 

 face behind the collar, and into this concavity the ventral 

 sucker projects very prominently. When the thin sides of 

 the body are spread out (and this is apt to be the case in 

 a whole mount in balsam) this is the widest part of the body, 

 but in the natural position of the parts, the widest part 

 succeeds a ** waist" at the posterior end of the ventral 

 sucker. From this level the body tapers gradually to a 

 long drawn out point so that it maybe designated acuminate. 



The collar is not so strongly developed as in P. bilobus, 

 and is always less than the width of the body. The division 

 or bay in its dorsal edge ends in front of the oral sucker, 

 and the two dorsal lobes overlap; but there is a wide bay 

 on the edge of the collar so that the two ventral angles 

 are widely separated. There are twenty-five spines in a 

 single row round the edge of the collar on each side. The 



