QUATERNARY FAUNA OF GIBRALTAR. 135 



Fig. .3. Portion of humerus, with the distal articular end entire. 



Fig. 4. An entire radius, with the lower portion of the ulna in situ: a, proximal 

 articular surface ; b, distal articular surface. 



PLATE XXV. 



Fig. 1. Right femur of Ibex : a, head. 



Fig. 2. A right femur of the largest size. 



Fig. 3. A right tibia: a, proximal articular surface; b, distal articular surface. 



Fig. 4. The distal end of a tibia of the largest size : a, distal articular surface. 



Figs. 5 a, b, c. Different aspects of the astragalus. 



Figs. 6 a, b, c. Diiferent aspects of an ungual phalanx. 



PLATE XXVI. 

 Figs. 1-4. Metacarpals of Ibex, of various sizes. 

 Figs. 5, 6. Metatarsals. 



PLATE XXVII. 



Odontogkams. 



Note. — The diagi-ammatic figures termed " Odontograms" (see Proc. Roy. Soc. vol. xviii. p. 544, 

 ISrO) are intended to supply tlie place of tables of measurements of tbe teeth, and at the same time 

 to exhibit graphically their proportional dimensions in each case. The figures also serve to indicate 

 which of the teeth of the typical series are absent or present. They are to be read thus : — 



The squares in each transverse series contain the odontogram of the upper or lower (molar) 

 dentition, or, in the case of the smaller animals, both, in ivhich case the maxdlai^ is marked a, and 

 the mandibular b ; and on the left-hand margin the name of the tooth with which each horizontal 

 line throughout the series corresponds, is indicated. In the figures themselves each dark horizontal 

 line corresponds with a single tooth, whose antero-posterior diameter, or length, is shown by the Hght 

 shade, and transverse diameter or thickness by the dark shade. As the paper upon which the 

 figures are laid down is divided into 20ths of an inch (003, =000136 metre), the dimensions of 

 the teeth can be read off at once. 



Fig. 1. Maxillary molar dentition of Hycena spelaa. 



Fig. 2. Maxillary molar dentition of H. crocuta (Gibraltar). 



Fig. 3. Maxillary molar dentition of H. crocuta. 



Fig. 4. Maxillary molar dentition of H. brunnea. 



Fig. 5. Maxillary molar dentition of //. striata. 



Figs. 6 and 6 a. Maxillary and mandibular dentition of Ursus ferox fossilis. 



Figs. 7 and 7 a. Maxillary and mandibular dentition of U. ferox s. horribilis. 



Figs. 8 and 8 a. Maxillary and mandibular dentition of the Gibraltar Ursus. 



Fig. 9. Maxillary dentition of U. letourneuxiaiius. 



Fig. 9 a. Mandibular dentition of U. faidherbianus. 



