No. 5-] PARIOTICHUS INCISIVUS COPE. 243 



right angle to the proximal portion. It is large and expanded, 

 with no trace of an entepicondylar foramen. The absence of 

 the foramen is rather a surprising feature, but is distinctly an 

 amphibian character, it is present in Parciasaiirus ; instead of 

 the entepicondylar foramen there is a deep notch, such as rep- 

 resents the ectepicondylar foramen in the Pclycosauria. The 

 ent- and ectepicondylar tuberosities are large and prominent, 

 but the condyles are not well developed. 



The radius and ulna are represented by the proximal ends 

 only. The ulna shows a definite but not well developed ole- 

 cranon fossa. The front foot of the left side has been preserved; 

 the distal ends of the radius and ulna are nearly in their normal 

 positions ; the bones of the carpus are all present, with the pos- 

 sible exception of the first carpal of the distal row. There are 

 well-formed scaphoid and cuneiform bones, and between these 

 an elongate element that was at first regarded as the missing 

 metacarpal I, but it seems more probable that it is the lunare 

 (intermedium) ; the upper end is incomplete, and the lower is 

 much the same in appearance as the end of the metacarpals ; 

 on the other hand, it occupies just the position of the interme- 

 dium, in a carpus that has been preserved in a very perfect 

 manner, and it fits the pu^itio . occupies very accurately. 

 According to this interpretation there are two centrale. There 

 are four bones in the distal row of the carpus ; the first is very 

 much larger than the others, and appears to represent the first 

 and second combined ; the outer edge is a rounded process, with 

 no face for articulation with another carpal. It is possible that 

 the first metacarpal was attached to this bone with the second, 

 but no traces of such a metacarpal remain. The metacarpals 

 are short and stout, with well-developed articular condyles. 

 The phalanges are not in contact with metacarpals, but a 

 series which corresponds very closely to the fourth in size 

 shows that they were also very short and strong. It is impos- 

 sible to say whether there were more than three phalanges or 

 not. Fig. 7 shows the arrangement of the bones very little 

 altered from their position in the matrix. 



The posterior limb is represented by the ends of the femur 

 and of the tibia and fibula. The femur shows well-developed 



