[* C. MITCHELLII (Benth. MS.) erecta, ramulis flavescenti-tomentosis, stipulis parvis subulatis, foliis ovali-ellipticis obtusis retusisve basi angustatis supra glabris subtus calycibusque subsericeo- pubescentitomentosis, bracteolis in pedicello brevissimo minutis setaceis, legumine sessili glabro. Allied to C. RETUSA and SERICEA, but flowers much smaller, in short dense spikes. It agrees in most respects with the short character of C. NOVOE HOLLANDIOE, etc., but the leaf is not articulated on the footstalk, and the stipules exist.] 11TH APRIL.--Proceeding due north we had the river close on our right hand, when two miles on. After making a slight detour to avoid a gully falling into it, we continued the same course over open forest land, and, at length, saw an immense sheet of water before us, with islands in it. This was also a lagoon supplied by floods in the Balonne. It was covered with ducks, pelicans, etc. I called it Lake Parachute, no natives being near to give me their name for it. I must here add that the true aboriginal name is not Baloon, however, but Balonne, and this I the more readily adopt to avoid the introduction of a name so inappropriate amongst rivers. I was obliged to turn this lagoon, by moving some way about to my right, for it sent forth a deep arm to the S. W. which lay across my intended route. Continuing to travel northward, we arrived upon the banks of a lagoon, where they resembled those of the main channel, having trees of the same kind and fully as large. The breadth was very uniform, and as great as that of the river, so that it seemed this had once been the bed of the Balonne. We crossed it at a dry part of the swamp, the waters extending and increasing in it to the eastward. In the opposite direction it was equally uniform and continuous, but apparently dry. On crossing this old channel, I turned sharply to the N. E., aware that it is usually at acute angles in a river's course that such overflowings break out. I found it necessary in the present case to turn eastward, and even to the southward of east before I could find the river again. At length we came upon the channel divided amongst ridges of sand, where the waters took a sharp turn and broke thus into separate currents. I was now very desirous to select a camp where the cattle might remain to rest and refresh while I proceeded with a small party to the N. W. This place did not please me, having been too scrubby, the water not well tasted, and the grass dry, therefore liable to be set on fire by the natives, or by accident. A bulbous species of CYPERUS grew on the bank of the Balonne, and in the river we found the common European reed, ARUNDO PHRAGMITES: a Loranthus allied to L. LINEARIFOLIUS, but with broader leaves, grew on some of the trees, and we saw a fine new species of ADRIANIA.[*] (No. VII.) Thermometer, at sunrise, 47 deg.; at noon, 102 deg.; at 4 P. M., 104 deg.; at 9, 69 deg.; with wet bulb, 62 deg.. Average height above the sea,