4 PROCEEDINGS OE THE GEOLOGICAL SOCIETY. [NoV. 7, 



In the characters h, c, d, e, f, g, the femur of the African reptile 

 approaches that oi Megalosaurus more nearly than that of Iguanodon ; 

 but it differs from that of Megalosaurus in the proportional size and 

 form of its trochanters, and in its much heavier proportions. 



An animal the thigh-bone of which approaches three feet in 

 length, may be fitly said to have " good legs," whence I propose the 

 generic name of EusJcelesaurus for this new African reptile, and the 

 specific title of Brownii, after its very intelligent and energetic dis- 

 coverer, who, in a letter dated the 18th of June, 1866, addressed to 

 Sir E. I. Murchison, states that the thigh-bones now described (and 

 the accompanying fossils numbered 1, 3, 4, 6, 9a, 95, 20a, 206, 21, and 

 49 a, h, c, d, e) were obtained " in the Stormberg range of moun- 

 tains in the division of Aliwal North, and about thirty miles from' 

 the town of Aliwal North. The fossils were found in a compact 

 freestone rock, which also contains other organic remains. The 

 height of the mountains from the base is about 3500 feet, and 

 about 9500 feet from the sea ; the strata containing the fossils about 

 1200 feet from the base." 



These additional fossils, and No. 47, of which I can find no men- 

 tion in the Hst sent by Mr. Brown, have the same aspect, and 

 appear to have been imbedded in the same matrix as the femora. 

 Nos. 9a, 9b, and 49a, h, c, d, e are fragments of two very large flat 

 bones, and 20a, 206 of a large metatarsal and metacarpal, which 

 very probably belonged to EusJcelesaurus. JN"os. 4 and 21 are inde- 

 terminable. 



JSTo. 3 is a very interesting fossil, comprising nearly seven inches 

 of the distal ends of a right tibia and fibula, with an astragalus in 

 undisturbed position, though much mutilated. The width of the 

 conjoined ends of the tibia and fibula is 7*8 inches, six inches being 

 occupied by the tibia alone. The antero-posterior diameter of the 

 tibia is 4-5 inches. The posterior surface presents a wide longitu- 

 dinal groove ; while the anterior appears somewhat trilobed, from the 

 presence of two superficial longitudinal depressions. The astragalus 

 is much damaged, but presents a general resemblance to that bone 

 in Crocodilia and in Scelidosaurus, its proximal end exhibiting a 

 concave surface, and its distal a convex pulley. 



No. 47 is the proximal end of a tibia, which answers very well 

 to the foregoing in size. It is remarkable for the great size of its 

 cnemial process, the inferior edge of which (so far as it is preserved) 

 is rounded and concave, like the procnemial process in the Plamingo 

 and the Albatros. These leg-bones would answer very weU to the 

 femur of Eushelesaurus. 



No. 1 is the broken articular end of a long bone of considerable size, 

 as the transverse diameter of its condyles when entire could have 

 fallen but Httle short of eight inches. At 7 inches from its extre- 

 mity the shaft of the bone has a transverse diameter of 5-5 inches, 

 an antero-posterior diameter of 6-6. The total length of the frag- 

 ment is 10*75 inches. 



The measurements of this fragment correspond pretty nearly with 

 those of •^ distal end of the 33-inch Iguxinodon femur. The two 



