328 Prof. H. G. Seeley on Euskelesaurus Brownii. 



inward, so that the inner margin is more concave than the 

 external border is convex ; seen laterally the bone has a slight 

 sigmoid curve, the head being inclined with a somewhat 

 Megalosauroid curve, which is also seen in the more Croco- 

 dilian types like Palceosaurus and Belodon. 



The head of the bone is fully 7 inches wide as preserved, 

 and was originally wider. Below the articular surface the 

 neck of the bone, if it may be so named, is compressed from 

 front to back, being flattened posteriorly, convex from side to 

 side in front, and 3^ inches thick in the middle, and concave 

 from above downward ; but there are no lateral concavities or 

 constrictions to define it from the head or shaft on those 

 borders. The neck may be considered to end at 6 inches 

 from the proximal extremity as preserved, where the bone 

 thickens from back to front, and the proximal trochanter is 

 developed on the anterior external lateral angle. 



The great trochanter is not divided from the shaft at its 

 proximal extremity, but is simply a laterally compressed 

 elevation on the outer angle of the bone. It is about 4 inches 

 long, with the base about 1^ inch wide ; proximally its sides 

 are compressed to a somewhat sharp angle, and distally it 

 rounds into the convex surface of the shaft, being only 

 marked by slight inflation and the rugosities of muscular 

 attachment. 



The circumference of the head of the bone is 18 inches. 

 The circumference below the proximal trochanter is 16 inches, 

 and 15 inches in the lower third of the shaft. The great 

 infero-lateral trochanter — trochanter minor — in the middle of 

 the shaft is broken away, though its limits are indicated. It 

 was directed backward, as Prof. Huxley has indicated, in 

 accordance with the Megalosaurian type. It begins 11 inches 

 from the proximal end, and may have been 6 or 7 inches 

 lone:, with the base 2 inches wide. A strong; muscular 

 attachment is seen proximally on its inferior surface. 



The shaft has a slight curve forward ; its sides below the 

 neck are subparallel, widening a little distally towards the 

 fracture, where the transverse measurement is 6 inches and 

 the thickness about 4 inches. As usual, the inner surface is 

 vertical at the distal end, and the postero-lateral surface is 

 oblique. The principal condyle is broken away, but strongly 

 indicated at 4 inches from the distal extremity, so that the 

 bone has probably lost but little of its length. 



The proximal end is stouter and wider than in Megalo- 

 saurus ; the distal end is much less expanded than in Zanclo- 

 don. As a whole, the bone is not more slender than in Masso- 

 spondylus. It is well distinguished from all other genera by 



