IN December 1962, a young roe buck was received at this laboratory for post-mortem examination. Incidental to other lesions there were about a dozen soft greyish nodules about 1.25 cm. diam. scattered throughout the surface and substance of the lungs. Microscopical examination of direct smears from these lesions revealed large numbers of first-stage Muellerius capillaris larvae and several live embryos encased in egg capsules. No adult worms were identified, but their presence is inferred by these findings.