MY S. J. .TUHNSTON. 325 



specimens have been found in Limnodi/nastes, and I think 

 there is no doubt tliat they are identical with those from 

 //y/a, of which I have 59 specimens, ten of which have been 

 sectioned. This fluke furnishes specially beautiful whole- 

 mounts, stained either with safranin or hsematoxylin, and 

 decolourised till tne parenchyma, from which these stains 

 wash out more easily than from the other tissues, has only a 

 faint tinge of colour. 



On comparison with the other members of this genus, Pneii- 

 monoeces australis shows close similarities with P. capyristes 

 Klein, and P. variegafus R., being more nearly related in its 

 structure to the former. Amongst those characters in which 

 specific differences occur in this genus, it agrees with both 

 species mentioned in the smooth integument, in the antero- 

 posterior extension of the yolk-glands, in the position of the 

 gonads, and, on the whole, in the arrangement of the uterine 

 loops. It fvirther agrees with P. variegatns in its lobed ovary 

 and elongated tubular cirrus-sac (Looss, 48), differing from 

 it, however, in the form of the testes, and in the arrangement 

 of the follicles of the yolk-glands, in the relative size of the 

 suckers, and in the much smaller size of the eggs, as well as 

 in several minor points. It further agrees with P. capj/risfex 

 Klein, in the form of the testes, especially in the larger size 

 of the posterior (Klein, 38) : the arrangement of the uterine 

 loops, and the position of the ovary and related parts corres- 

 pond more closely to Klein's species than to Rudolphi's; our 

 Australian species differs from P. capyristes, however, in the 

 shape of the ovary and cirrus-sac, in the arrangement of the 

 follicles of the yolk-glands, and in the size of the eggs. 

 Literature referred to— 14, 38, 48, 50, 51, 55, 79, 81, 88. 



Genus GoRaoDRRA Looss. 



GOROODKRA AUS'I'RALIENSIS, .'ip.U. 



(Figures 12, 63-68.) 

 Diagnosis. — Elongated, oval worms with the usual nar- 

 rower, very extensible portion anterior to the ventral sucker, 



