In the rocky gullies, we found the following plants: a new species of Grevillea, having pinnatifid leaves with very long divisions, the blossoms of a fine red, and the seed-vessels containing two flat seeds, surrounded by a narrow transparent membrane; Leucopogon juniperinum and lanceolatum; a Dodonaea with long linear leaves and D. triquetra, were frequent. Dec. 4.--I went with my whole party to Zamia Creek, the latitude of which is 25 degrees 5 minutes 4 seconds, and which is about sixteen miles west by north from our last camp. Dec. 5.--We followed Zamia Creek about six miles down. It is very winding and scrubby; the rock on its banks is a clayey flagstone (Psammite); the upper strata are more clayey, and break in many small pieces. Several hills approached the creek; and a large mountain which I called Bigge's Mountain, in acknowledgment of the kind support of Frederic Bigge, Esq., was seen to the eastward. A large kangaroo started out of the creek, and was killed by our dogs; it appeared to be rather different from the common one, being remarkably light-coloured, with a white belly, black end of the tail, and the inside of the ear dark. We soon met with a fine reedy water-hole, with swarms of little finches fluttering about it; and, the place being suitable, I encamped for the night, and took the opportunity to repair some of our harness. The night was cloudy; the morning very fine; and the day very hot, with an occasional fresh breeze from the northward, which generally sets in about eleven o'clock. Thick cumuli came from the northward during the afternoon, but disappeared towards sunset. Dec. 6.--After a fine night, we had a cold morning with heavy dew. From the hills near the camp, Mount Nicholson bore N. 30 degrees W. and Aldis's Peak due north; Bigge's Range was in sight to the eastward. The horses had gone back to Ruined Castle Creek, about twenty-one miles distant; and the bullocks to our last camp, which, according to Charley, had been visited by the Blackfellows, who had apparently examined it very minutely. It was evident that they kept an eye upon us, although they never made their appearance. Our allowance of flour was now reduced from six pounds to five.