AbstractThe distribution of pores in egg shells has been studied by using a counting technique described in an earlier paper. The distribution is very different from the Poisson form, and different, but less so, form the negative binomial form. A new distribution, based on a modification of the Poisson form, has been developed, and this appears to fit the data quite well. The distribution is such as to give an arrangement of pores lying somewhere between randomness and complete uniformity, and a possible reason for this is discussed.