The Australian SKA Pathfinder (ASKAP) is being used to undertake a campaign to rapidly survey the sky in three frequency bands across its operational spectral range. The first pass of the Rapid ASKAP Continuum Survey (RACS) at 887.5 MHz in the low band has already been completed, with images, visibility datasets, and catalogues made available to the wider astronomical community through the CSIRO ASKAP Science Data Archive (CASDA). This work presents details of the second observing pass in the mid band at 1367.5 MHz, RACS-mid, and associated data release comprising images and visibility datasets covering the whole sky south of $\delta_{\text{J2000}}=+49^\circ$. This data release incorporates selective peeling to reduce artefacts around bright sources, as well as accurately modelled primary beam responses. The Stokes I images reach a median noise of 198 $\mu$Jy PSF$^{-1}$ with a declination-dependent angular resolution of 8.1–47.5 arcsec that fills a niche in the existing ecosystem of large-area astronomical surveys. We also supply Stokes V images after application of a widefield leakage correction, with a median noise of 165 $\mu$Jy PSF$^{-1}$. We find the residual leakage of Stokes I into V to be $\lesssim 0.9$–$2.4$% over the survey. This initial RACS-mid data release will be complemented by a future release comprising catalogues of the survey region. As with other RACS data releases, data products from this release will be made available through CASDA.

Having attempted to investigate the Polychæte fauna of the Plymouth district during those favourable opportunities which have occurred during the past three years, I now put upon record some few notes respecting a small section of this interesting but extremely perplexing group.

Silicon implanted with arsenic or boron has been annealed with a 100kW argon arc lamp turned on for a few seconds until the wafer temperature was in the 850–1250°C temperature range. The differences in defect behavior between such rapid annealing and furnace annealing is pointed out, and the dopant diffusion is measured. Aside from an initial movement of the boron atoms left in interstitial positions after the implant, diffusion of the boron and arsenic is consistent with standard diffusion models.

I am greatly indebted to Dr W. S. Bruce, the able leader of the Scottish National Antarctic Expedition, for the opportunity to describe the Scotia collections as regards the Pycnogonida and the Isopoda. We are now concerned with the Pycnogonida, and I regret that there has been so much delay before the production of the report. The collection is a large one, and extremely interesting—totally different from that made by the Discovery in the same region, but on the opposite side of the world. If smaller in the number of species brought home, in number of individuals it far exceeds that collection. Its principal interest lies in problems of distribution.