TREMATODES OF AUSTRALIAN BIRDS. 249 



MICROPHALLUS^. 



Levinseniella howensis, from the caecum of Charadrius 

 dominions, finds its nearest relative in L. brachysoma, 

 Jagers., which is parasitic in a Scandinavian species of 

 Charadrius. 



Cephalogonimin^e . 

 Prosthogonimus vitellatus, Nicoll, found in Chibia brac- 

 teata is closely related to P. cuneatus found in several 

 European Passeriformes. 



DlCROCOELIIN^E. 



Platynotrema biliosum, Nicoll, and P. jecoris, Nicoll, 

 two closely related members of this sub-family are found 

 in the liver of the same species of host, the Stone Curlew, 

 Burhinus grallarius, and are related most nearly, perhaps 

 to Dicrocoelium illiciens, Brd., which occurs in several 

 Brazilian birds, e.g., Rhamphastus sp., and Pipra sp. 



Lyperosomum parvum, sp. n., parasitic in one of the 

 Corvidae, Strepera versicolor, is evidently very closely 

 related to an unnamed species of Lyperosomum in von 

 Linstow's collection, figured by Braun (PI. x, fig. 66), which 

 was obtained from the intestine of Corvus cor one. Two 

 other species, L. megastomum and L. harrisoni which are 

 probably related to L. parvum are found in birds not belong- 

 ing to the Corvidae. 



Harmostomin^e. 

 Harmostomum pulchellum from the Wonga Pigeon, 

 Leucosarcia picata is related to H. mordens, Brn., which 

 is found in Rallus sp., birds fairly closely related to the 

 Oolumbiformes to which the Wonga Pigeon belongs. 



Olinostomijsle. 

 Clinostomum australiense, sp. n. from the oesophagus of 

 Plotus novce-hollandice is closely related to C. marginatum 

 found in various species of Ardea in America; while C. 



