The Mexican Tree Porcupine [Cercolabes (Sphingurus) novae-hispaniae], an animal of 95 cM. total length, of which about a third must be counted for the tail, inhabits the east coast of Mexico. The shiny hairs are very dense and soft, a little frizzy and so long, that many spines are completely covered by them. The spines are also missing from the parts, with the exception of the lower neck, on the inside of the legs, on the snout and on the rear half of the tail, which is covered from above naked, from below with black, on the sides with yellow brushes.