Points in the morphology and anatomy of certain megapodes. Part i.—the pterylosis. Part ii.—the myology of the hind limb.

My material consists of a number of specimens of two genera, "Catheturus lathami" (the "Scrub- Turkey") and "Lipoa ocellata" (the "Mallee Fowl").<br>In addition, I have a chick (12 days hatched) of "Megapodius eremita," on the pterylosis of which I make some notes, but which I have not dissected.<br>The specimens were all obtained through the assistance of the fund of the John Coutts Scholarship, of Sydney University, of which for one year I was the holder.<br>PART I.—PTERYLOSIS.<br>All the genera of the Megapodidae so far described resemble the typical gallinae in a number of points in their feather arrangement, but most especially in the fact that the two parts of the ventral tract unite before reaching the anus. They, however, agree with one another, and differ from the typical gallinae in the possession of the interrupted ventral tract, the presence of the large dorsal interscapular space and the fusion of the lumbar with the dorsal tract.<br>It seems possible that the Megapodidae are capable of being divided into two groups.<br>The first of these have the oil gland tufted, and are aquincubital. This group would probably be found to include all the species belonging to the genus "Megapodius," but at any rate includes "M. eremita" and "M. pritchardi." The second group would include those genera with a nude oil gland and quincubital wing, comprising the genera "Catheturus," "Lipoa," and probably "Megacephalon," although we have no evidence yet, in the case of this genus, as to the wing being diastataxial or otherwise.<br>PART II.—MYOLOGY OF THE HIND LIMB.<br>Myologically, I have as yet examined only two genera of the Megapodidae — "Catheturus" and "Lipoa." In both cases the enormous strength of the leg muscles is very noticeable, particularly as regards the muscles of the thigh. The size of these muscles is much greater than in Gallus.