BY S. .). JOHNSTON. 349 



of hosts, as mammals, birds, reptiles, show faunal groups of para- 

 sites with relations analogous to those exhibited by the group 

 from frogs, as small collections of parasites in my possession obtain- 

 ed from hosts of the classes mentioned, go to show. But for the 

 present, I must confine my remarks to the groups from the fi-ogs. 

 Opisthioglyphe endoJoha, occurring in the intestine of European 

 frogs, is represented in North America by Glypthelmins qui^ta, 

 and in Australia by Dohchosaccus spp., which also live in the 

 proximal part of the intestine of their hosts. The three European 

 species of Pneumonoeces, found in the lungs, are represented in 

 America by no less than six species (P. longiplexus Stafford, P. 

 breviplexus Staff., P. varioplexus Staff., P. similiplexus Staff., P. 

 vifidioplexHs Staff., and P. complexux Seeley), while they are 

 represented in Asia by P)ifiimon(£ces capyristes Klein, and in 

 Australia by P. australis. The Goryoderime, represented in 

 European frogs by the two genera, Gorgodera and Gorgoderina, 

 comprising between them, according to Ssinitzin(73), five separate 

 species, all living in the bladder of frogs, are represented in 

 America by four species of Gorgoderina and one of Gorgodera. 

 No species of Gorgodera has yet been described from Asia, but 

 the genus is represented by one species in Australia. The Euro- 

 pean BrachycfeHu77i crassicolle R., found in the intestine, is 

 represented in America by B. hospitals, in Australia by three 

 species of Mesoccelhim, and in Asia by M. sociale. The Pleuro- 

 genetince, occurring in the anterior part of the intestine, are 

 represented in Europe by three genera (Prosotoctis, Pleurogenes, 

 and Brandesia), comprising, between them, seven species; in 

 America by Loxogenes arcanum, in Asia by Pletirogenes gastro- 

 porus and P. sphcericus, and in Australia by P./reycinefi and P. 

 nolus. Halipegus ovocaudatus, u(;curriiig in the buccal cavity of 

 European frogs, is represented in North America by H. occidualia, 

 in South America by H. dubius(K\ehi, 38, p.68), and in Asia by 

 H. longispifia, all living in similar situations; but, up to the 

 present, no representatives of this fluke have been found in Aus- 

 tralia. Diplodiscus suhclavatus, in the rectum of European frogs, 

 is represented in America by D. temperatus, and in Australia by 

 two species of Diplodiscus, The European Polystonium integer- 



