TREMATODES OF AUSTRALIAN BIRDS. 213 



genital pore and the gonads in P. consimilis, Dietz has not 

 been able to determine owing to his material being badly 

 preserved. (13) 



Patagiper fraternus, sp. nov. (Fig. 4.) 



Diagnosis. — Body linear, with sides parallel to behind 

 the middle. Head collar as wide as the body. Ratio of 

 oral to ventral sucker 1 : 6. Genital pore in front of the 

 intestinal fork. Gonads close together; ovary oval, 

 obliquely placed in the middle line. Eggs oval, 0*107 x 

 0*069 mm. 



Host. — Heroclias timoriensis, in the intestine. 



Type specimen in the Australian Museum, Sydney, No. 

 W. 433. 



Five specimens of this worm were obtained by Dr. Harvey 

 Johnston from the intestine of the egret, Heroclias timori- 

 ensis, at Burnett River, in Queensland. While it is fairly 

 similar in most respects to P. acuminatus, and must be 

 looked upon as closely related to that worm, it differs in 

 ■detail in a number of respects. 



The body is linear with the sides parallel in the anterior 

 two-thirds; behind this it tapers to a point. The average 

 size is over 10 mm. long by more than 1*25 broad. The 

 largest specimen measured 11*75 x 1*44 mm. The head 

 collar is as wide as the body; its dorsal bay is wide and 

 gaping. There are twenty-eight collar spines in a single 

 row on each side, being very small in the dorsal bay and 

 large laterally. The spines along the lateral border (0*144 

 x 0*04 mm.) are longer than those of P. acuminatus. In the 

 ventral corners, on the inner surface of the collar, on each 

 side there lies a group of four spines not in series with 

 those running round the edge. They point in towards the 

 middle line and are placed further back from the edge than 

 the others. Two are large 0*128 x 0*054 mm., and two 



