Koorgielah { Plain Turkey Bergamo { Native Dog Cubburah Woonco Whistling Duck Chewelah Many other instances could be given, but they all partake of the same divisions and classes. A blackfellow can only marry into one class, namely that opposite to his name, the other three are forbidden to him strictly. The descent seems to be reckoned through the mother, for the child takes its name, not from its mother's class, but from the grandmother's class. The class name always goes back to that of the grandmother on the female side, the father's class name having no influence in the matter. Woonco's daughter is always Coobaroo, and Coobaroo's daughter is always Woonco, and so on through succeeding generations. The father might possibly be of a name representing the proper class, but from a far away tribe, for they correspond in class though not always in name; still the children take their name through the mother in this tribe. The blacks understand these relationships well, and exemplify them with two sticks crossed. CHAPTER XII. PHYSICAL FEATURES. The annual reports issued by the Water Supply Department of Queensland give detailed accounts of the annual and average rainfall over the whole of the colony, with the results of boring for artesian water, both privately and by Government. It is one of the most valuable and interesting reports issued, and with the rain maps accompanying it, conveys in a moment an accurate estimate of the average rainfall both on the coast and in the far interior. Beginning at Mackay, where the tropical rains commence, and following the coast line to Cape York, the record is higher than anywhere else in the colony, owing to the near approach of the high ranges to the coast. The maximum rainfall recorded in one year is reported at Geraldton, where 211.24 inches fell in 1894; Cairns can boast of 174.56 inches as its highest rainfall; this occurred in 1886. At Cape York, the average is 60.87; and at Mackay, 72.73 inches; these numbers give a general indication of the humidity of the climate on the east coast of North Queensland. As we advance into the interior a far different climate prevails, and the farther west we go, the lighter becomes the rainfall, till it would almost appear as if it scarcely ever rained in some places in the interior, which are not much raised above the level of the sea. At Birdsville, low down on the Diamantina River, on the borders of South Australia, the rainfall taken for three years, amounted to only 5.72 inches, and on the Mulligan, where for six years an average was taken, it amounted to only 5.77 inches. At Boulia, on the Burke River, the average for nine years was 13.54 inches.