roof 30 feet overhead. Light filters in through another entrance, and the bats, whose eyes glowed orange-yellow as they hung in small groups, were escaping there. Now tried to go out by the way we entered as I had two lamps posted there with sticks & all they saw was a swift. On the opposite side of the caverns a low tunnel dipped steeply to a lower level (30 feet down) where it bent T-fashion, the right arm, though large beginning to ascend again, while the left arm continued gradually downwards. This arm is the main drain of the caverns and a miniature stream originates there. The cave is dissolved out of limestone, stalactites & odd-shaped formations being common. In many places the original beds of rock nearly vertical can plainly be seen. The T-shaped part is the residence of a much smaller bat (Nyctophilus ?) whose eyes do not shine. The left branch wanders down through a series of chambers becoming progressively smaller & narrower until the roof drags down to a mere 2 feet above the floor and the walls are only a yard apart - the stream goes on down however. All told this part may be 200 or 300 feet long. We returned to the outside with 32 Dobsonia, 12 Nyctophilus and two cave-rostriscripts (a small colony in the left arm of the T). I saw also rocks, spiders & some kind of Centipedes. Seven only of the Dobsonia were males. The sexes of the other lot were about evenly taken. Two nursing young Dobsonia (the members of the wings almost without pigment) were brought down. Then, Dec. 11, when skinning Dobsonia noticed beside the usual actively running "bed-lies" a yellow mite and what is apparently a true louse - both fixed in the membrane. Today went to the other cave, a mile S of the