The tail H. c.) of the common Bornean Porcupine, Hystrix crassispinis, shovv-
in g the modified quills, enlarged at a} which make the rattling noise. Tail (T. I.) of'quill-less Porcupine, Trichys lipura, showing the scaly covering and the fine terminal quills, enlarged at b.
To face p. JQ.To face p. JQ.