Studies on the Helminths of India. Trematoda I

Abstract

The material of Eurytrema pancreaticum from Hyderabad (Deccan) was examined and found to agree with the material of this species from China and Japan, described by Looss (1907) except in the case of cirrus sac which terminates anterior to ventral sucker.Numerous specimens of the variety of E. pancreaticum with deeply lobed testes from the pancreatic ducts of a cow in Bengal were examined and it is found that the smaller and the larger forms belong to the same species. Variations occurring in several organs of this variety have been recorded.A discussion on the existing species of Eurytrema has been evoked and these have been grouped under five subgenera, four of which being new ones.The species E. ovis, E. robustum and E. cuyabai are considered to be synonyms of E. pancreaticum, E. lubens and E. intermedium respectively.The species E. parvum Travassos, 1916 being a homonym the name E. travassosi has been suggested for it.Paradistomum moghei n.sp. has been described and separated from the existing species of Paradistomum.Mesoccelium leiperi n.sp. has been described and separated from the existing species of Mesocalium.Mesoccelium sociale has been recorded from Rana tigrina and measurements of some of its organs are given.