ELEPHAS MERIDIONALIS.— TIBIA. 225 



Breadth across the head 8*5 inches. 



Diameter of outer condyle (a. p. d.) 45X3-5 inches. 

 „ inner 5'5x 4* 5 inches. 



Girth of head 25 inches. 



„ midshaft ITS inches. 



Distal articulation (a. p. d.) 5 inches. 



Transverse 5*5 inches. 



Girth, distal end, 18*8 inches. 



Here the spine is prominent, with a pronounced concavity for the extensor muscles, 

 to the extent of 5| inches broad at the top, with much beetling of the former and deep- 

 ening of the hollow posteriorly, as shown in the tibia of the Mammoth. 



No. 242, Gunn Collection, is an injured tibia from B acton, of much greater propor- 

 tions than the last. The transverse diameter of the proximal articular surface is 12 

 inches, with a girth of head of 35 inches. Here there is also a prominent spine and deep 

 pit for the muscles. 



No. 243, Gunn Collection, is a distal end of a large tibia from the " soil of the 

 Forest Bed." The antero-posterior and transverse diameters of the articulations are 

 5*5 and 6*5 inches respectively. The fibular facet is hollowed out and not erect; it is 

 4x35 inches in breadth. 



No. 246, Gunn Collection, from the " Iron-pan, Forest Bed," is another enormous 

 distal end, with an articular surface of nearly equilateral dimensions, being 6' 5 in the 

 a. p. d. to 6*5 inches in the transverse, consequently like that of E. antiquus (PL XIX, 

 fig. 11 a). The fibular facet is small in this specimen as compared with the preceding, 

 but, like it, it is almost horizontal. 



No. 247 is a beach specimen, with a tarsal facet of 5x6. Here the fibular facet is 

 also nearly horizontal, and large as compared with the last, being 2x2 inches. 



No. 241 is an entire tibia encrusted with the "Iron Pan" of the Forest Bed. It 

 clearly shows a much smaller animal than any of the foregoing from the same deposit. 

 The length is only 2 feet, and breadth of proximal articulatory surface 8 by 4 inches in the 

 antero-posterior direction. As far as size is a criterion, this bone may have belonged to 

 the Mammoth. 



No. 21,305, B. M., is a very large tibia from Ilford, and evidently the leg-bone of 

 an adolescent individual, as the proximal epiphysis is wanting. The shaft is very stout, 

 and altogether too large for the Mammoth. It may possibly belong to & antiquus. The 

 dimensions are — length 25 inches; girth, midshaft, 12*4 inches ; distal articulatory aspect 

 4 a. p. d. by 5*5 inches in the transverse. 



