In a recent contribution to Parasitology (present volume, p. 26) a short description of the male of this species was given. The type-material consisted of a single male from the Silurid fish, Heterobranchus anguillaris, from Cairo. Through the kindness of Dr W. N. F. Woodland, of the Wellcome Bureau of Scientific Research, the writer has recently had the opportunity of examining further material belonging evidently to the same species, the host being Synodontis eupterus and the locality Khartoum. This material consists of several males, one mature and two immature females, all mounted as microscopic preparations in glycerine-jelly. A few further details may now be added to the description of the species.