1. Observations on the Diatomaceous Sand of Glenshira. Part II. Containing an Account of a number of additional undescribed Species

Extract

The author, after referring to his former paper on this subject, stated that he had continued the investigation, and that the number of undescribed forms besides those formerly figured had proved so large, that the present paper does not conclude the subject, but that a good many forms remain for a future communication. He added, that even now, after he had explored 600 slides of it, new forms were still occasionally found.