AT Section D of the British Association in two successive years I asked for an explanation of the generic name Calymene, without obtaining it from a roomful of zoologists. On the second occasion I suggested, among other guesses, the remote possibility of a derivation from the Greek word κeκαλυμμeνη. Since then, while consulting Buckland's Bridgwater Treatise of 1836 for quite another purpose, I have found (vol. 1, p. 371) a footnote on genera of Trilobites giving “Calymene, from κeκαλυμμeνη, concealed,” with Buckland's comment that such names were “devised expressly to denote the obscure nature of the bodies to which they are attached.”