A specimen of Cysticercus tenuicollis is described, which contained many daughter cysts in various stages of development. One of these cysts was a well developed daughter cysticercus.

The daughter cysts at all stages of development, are lined internally by a distinct cuticle, and have no scolices. The daughter cysticercus, like the parent bladder, has an outer cuticle and a well developed scolex and receptacular appendage.

There is evidence for regarding the daughter cysticercus as having been formed from a daughter cyst by a process of evagination of the latter in such a way that the cuticle has come to lie on the outside, rather than by a process of vesiculation of a scolex.

The daughter cysts appear to be homologous with the brood-capsules of Echinococcus. They are not strictly homologous with daughter hydatids or daughter coenuri.

In February 1947, Mr. D. W. C. Northfield, M.S., F.R.C.S., of the Neuro-surgical Department of the London Hospital, removed by operation a small coenurus from the spinal cord of a 14-year-old girl of Gillingham, who had developed symptoms of paraplegia in December 1946. The girl, who has never lived outside Britain, is presumed to have become infected during a period of evacuation in Wales in 1943–45, where she had had contact with a dog. Professor J: J. C. Buckley, who secured the coenurus through the kind offices of Professor Dorothy Russell, has already made a brief report on it (Buckley, 1947) and has placed at my disposal the original material for detailed study and identification.

Desmidocercella leiperi n.sp. from Ardeola grayii is described in detail and compared with other related species.

Two species of Oxyspirura are recorded from new hosts. Oxyspirura mansoni from Galloperdix spadicea and O. (Cramispirura) popowi from Copsychus saularis.

Two new species of Oxyspirura are described, O. (Cramispirura) indica n.sp. from Kittacincla malabarica and O. buccosulcata n.sp. from Temenuchus pagodartum.

The present paper consists of descriptions of an encysted developing stage of Asymmetricostrongylus dissimilis, and of four newz species, Globocephaloides trifidospicularis, Pharyngostrongylus longibursaris, Zoniolaimus cobbi and Labiostrongylus australis. With the exception of L. australis, which is doubtfully recorded from Python spilotus, all the species came from the alimentary canal of the Australian wallaby, Macropus rufogrisea fruticus.

The gall-forming nematode, Anguillulina balsamophila (Thorne) Goodey has been described by Thorne (1926) who figures a photograph of a galled leaf of Balsamorhiza sagittata. Thorne gives a brief description of the superficial appearance of the galled leaves and mentions that the heavily infested plants are often very stunted. He recorded the parasite on three hosts, two species of Balsam-root, Balsamorhiza sagittata Nutt., B. macrophylla Nutt. and Mule-ear, Wyethia amplexicaulis Nutt. Later Steiner and Buhrer (1933) reported the parasite from the annual sunflower, Helianthus annuus L. collected and identified by W. D. Courtney. The detailed structure, however, of the gall has not so far been described and as suitable material was to hand, this paper is the result of some observations made on the gall structure.