134 DISCOGLOSSIDiE, 



or directed a little forwards ; the second is the longest, 

 nearly horizontal or directed a little backwards, and 

 sends off from the middle of its upper border a short, 

 slender process, directed outwards and backwards ; the 

 third rib, which may be somewhat curved, is directed 

 slightly backwards, and in length is intermediate be- 

 tween the first and second. The following vertebrae 

 have no distinct ribs, but the diapophyses are longer 

 and more slender, the last two or three beiog turned 

 more or less distinctly forwards. The diapophyses 

 of the sacral vertebra, which cover the anterior extre- 

 mities of the ilia, on which they may shift forwards 

 and backwards to some extent, are moderately dilated, 

 their diameter at the free extremity being somewhat 

 less than their length. Two condyles for articulation 

 with the urostyle. The latter is a little longer than 

 the rest of the vertebral column, and bears on each 

 side at its base a short, slender, transverse process 

 directed obliquely backwards. 



Pr^coracoids slender, curved, entering the glenoid 

 cavity ; coracoids stronger, feebly curved ; supra- 

 scapula ossified ; omosternum cartilaginous ; sternum 

 produced into two long, slender, diverging processes. 

 Humerus once and a half to once and two-thirds as 

 long as radius-ulna. Carpus with eight bones, two of 

 which are in contact with radius-ulna; a single bone in 

 the poUex, very large in the male ; metacarpal of inner 

 digit enlarged in the male, with strong inner crest. 



Pelvis neai^ly two-thirds the length of the vertebral 

 column ; pubis cartilaginous ; acetabulum open. Femur 

 and tibia with the epiphyses cartilaginous, the former 

 strongly sinuous and shorter than the latter ; astra- 

 galus a little longer than calcaneum, from which it is 

 perfectly distinct throughout, owing to the absence of 

 calcified epiphyses, and one-half or rather more than 

 half the length of tibia-fibula; three tarsalia in the 

 distal row, one or two of which may ossify ; and two 

 bones to the prsehallux. Distal phalanges obtuse, 

 slightly expanded at the apex. 



