He also questions the propriety of the separation according to the Distichous arrangement of the hairs of the tail.
"Natural History of the Mammalia of India and Ceylon"
Robert A. Sterndale
After a careful examination of the organ in nearly all the members of the series, he writes: "I have failed to detect that it is essentially distinctive of them-that is, that the Distichous arrangement of the hairs is always associated with a diminutive species; but at the same time there can be no doubt that it is more prevalent among such."
"Natural History of the Mammalia of India and Ceylon"
Robert A. Sterndale