The observations given below are by Mr. William Roach (Series I), Associate Member M. B. A., and by Mr. H. Roach (Series II), the fishennan of the Association. The observations are taken partly in Plymouth Sound and partly on the fishing grounds a few miles to the eastward. A careful comparison of the two sets during the same periods does not show any local differences, and as the observations are true sea temperatures throughout, it is unnecessary to state the positions more definitely.