 The forward-directed canal also splits into the three main branches of the infraorbital nerve, all of which connect to the socket of the canine; the junction occurs about along the canal, another point of variation between the two skulls.The top branch, the external nasal ramus, splits into four branches in the type skull, but it does not split in the second skull.In other therapsids like "Thrinaxodon", "Bauria", and "Olivierosuchus", the external nasal ramus generally splits into three or more branches.