1. Nematobothrium labeonis n. sp. from the orbit of three species of Labeo is described.

2. The more recent literature relating to the classification of the genus is considered.

3. N. labeonis is contrasted with related species.

In his “Monograph on the Anguillulidae, or Free Nematoids, Marine, Land and Freshwater; with Descriptions of 100 New Species,” published in 1865, Bastian described a nematode which he found in the yellow lichen Xanthoria (then known as Parmelia) parietina. He named it Aphelenchus parietinus, giving a short description and two drawings. His drawings are reproduced in Fig. 1 and his description is as follows:

A description is given of stainless steel gauze baskets used to contain cysts for infecting potato plants.

1. The first experiment showed that there is a considerable loss of DD vapour from the surface layer of soil, and that this loss is only moderately reduced by using a water seal or a non-gas-tight seal of foil. The effect of this is to leave a residue of potato root-eelworm “survivors” in the top 2 inches of soil and so to make DD less effective than it would be if the loss could be prevented.

2. The second experiment showed that the survivors could be dealt with by treating the soil surface with a micellar solution of p-m cresol, solubilized by the method of Staniland and Stone. It also established the fact that the two treatments behave independently at all levels: there was no interaction between them.

In February, 1958, Dr. Paulian, of Paris, asked the senior author to study his collection of free-living marine Nematodes, collected at Kerguelen Island. The visit of the junior author enabled us to study this material in collaboration; this was the more interesting since she had already made extensive studies of free-living marine Nematodes of the antarctic region (dredged from between 150° E to 40° E by the British Australian and New Zealand Antarctic Research Expedition). Moreover, we had access to the recent monograph of Wieser (1958) on the Enoploidea of Chile.