In a paper published towards the end of last year the author (Goodey, 1927) described a new free-living species of Aphelenchus, A. winchesi, and dealt with the type species of the genus A. avenæ, discussing its affinities to certain nearly related species. A further paper was promised dealing with the various species of the genus and the present communication is an attempt to fulfil that promise.

The species of Onchocerca described in this paper was received some months ago from Mr. J. L. Stewart, M.C., M.R.C.V.S., from Tamale, Gold Coast Colony. The cysts containing the parasites are found most commonly in the subcuticular connective tissue of the inter-costal muscles; but they are also found elsewhere, usually in a superficial position. Mr. Stewart in a letter accompanying the material, draws attention to their superficial resemblance to Cysticercus bovis.

Ælurostrongylus abstrusus, discovered by Mueller in the lungs of cats in Germany, has since been reported from various other countries in Europe. In many cases the diagnosis has been based on the recovery of the characteristic larva but occasionally a few adults have been found. These have generally been isolated by teasing up the lung substance in normal saline and then searching through the fluid by means of a low-powered objective or a dissecting microscope. The technique adopted by the writer was to cut thin slices of lung tissue, to compress these between two ordinary glass slides, and to examine them with an inch objective. The larvæ could be easily found in the expressed fluid and adults could be noticed as dark masses in the lung itself. When seen, the adults were removed by means of dissecting needles.

By the close of the winter of 1925–26, the author's investigations into the value of certain drugs in the treatment and control of liver rot of sheep had reached a stage when it was felt that further advancement in certain important directions necessitated the employment of sheep subjects which had become infested with Fasciola hepatica to a known degree at a particular time. Naturally infested sheep were unsuitable, since observation had demonstrated a great variation—as regards both extent and type—in the infestation of sheep of the same flock.

The writer has found three apparently new species of trematodes in the newt, Triturus viridescens Rafinesque. The newts were collected near Durham and Lakeview, North Carolina, and a study is being made to determine if there is any seasonal periodicity in the occurrence of their parasites. It is of interest that one trematode, Opisthodiscus americanus, is the first species of its genus to be reported for North America. Only one species of Brachycælium has been reported previously for North America and another, B. trituri, is described in this paper. A new species, Gorgoderina intermedia, is also described.