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MR. GARROD ON THE ANATOMY OF THE MAI.EO. [May 21, 



scaly. The hypopteral tract is but feebly represented, and the 

 termination of the pectoral tract is some distance from the commence- 

 ment of the abdominal tract, the angle between the direction of the 

 one and the other being about 25°. 



A strong tract traverses the middle dorsal line of the neck, with a 

 space on each side of it. This does not bifurcate in the scapular 

 region, but ceases abruptly a little below the level of the shoulder- 

 joints, undilated. Over the rump and the inferior scapular region 

 the dorsal tract is diffused and indefinite, ceasing before the nude oil- 

 gland is reached. There is no ephippial space. There are sixteen 

 rectrices. The lumbar tract is only well developed over the tibia- 

 head and for a little way behind it. The humeral tract is not in any 

 way peculiar. I counted nine primary and sixteen secondary 

 remiges, the first and second secondary feathers being considerably 

 shorter than those which follow. 



Down-feathers are generally distributed. The after-shaft is weak, 

 and the rhachis of each feather is not swollen, except in some of the 

 smallest size. 



Lower larynx of Megalocephalon inaleo. 

 a. From the front ; b. From behind. 



Visceral Anatomy. — The tongue is simple and fleshy ; a well-de- 

 veloped crop is present, situated between the limbs of the very open 

 fur cula ; the proventriculus is zonary, the gizzard powerful ; the 

 small intestine is four and a half feet long, the simple cseca five and 

 a half inches, and the large intestine five inches in length. 



There is only one carotid artery, the left, as in all the Megapodiidae. 



In its myology the bird is perfectly gallinaceous, the third pectoral 

 muscle being found beneath the much larger second of the same 

 name, the femoro-caudal and semitendinosus with their accessories, 

 the ambiens, gluteus maximus, being all present. The obturator in- 

 ternus is triangular ; a vinculum joins the two deep flexors of the 

 foot, and the biceps of the arm sends a fasciculus to the patagium. 

 The expansor secundariorum muscle ends by running to the scapula 

 at the same time that it sends a slip of tendon to the first rib. 



