1897.] NEW PALEOZOIC VEKTEBRATA. 89 



There are eighteen dorsal and twenty-three caudal vertebrae, 

 and parts or wholes of twenty-two dorsal and three caudal ribs, 

 preserved. The vertebral bodies are amphiplatyan or amphicoelous, 

 but which, is not readily determined. Where the centra are split, 

 an indication of notochordal canal is visible, but the impression 

 may be that of the external right face of the centrum, and not that 

 of the cast of that canal. Most of the centra expose the left side, 

 displaying low and contracted neural spines on the lumbar region, 

 and none on the dorsal. There are two sizes of caudal centra, a 

 longer and a shorter. Where these occur in pairs they might be 

 supposed to be the halves of a divided centrum, such as occur in 

 the Lacertilia, but several of them are single, and in place. No 

 trace of chevrons is to be seen. The ribs are slender, not alate, 

 and recurved. The caudal ribs are shorter and more strongly 

 recurved. The sacrum and pelvis are too much obscured for 

 description. 



The posterior limbs and feet are the most interesting part of this 

 specimen. The femur is moderate, with expanded extremities, the 

 distal divided by a popliteal groove. The tibia has the usual tri- 

 angular head and contracted distal end, and has a straight shaft. 

 The fibula is slightly curved, the interosseous border being strongly 

 concave, and the distal end is oblique, and is wider than the proxi- 

 mal. The tarsus includes but two elements in the proximal series, 

 of which the internal (intermedium all or in part) articulates with 

 both tibia and fibula. The fibulare is a little the larger, and has a 

 longer distal articular border. Distad of these there are six ele- 

 ments, one opposite each metatarsal, except the fifth, which has 

 two. If we call the internal No. i, and the external No. 6, they 

 are arranged in the order of size as follows, beginning with the 

 smallest, 6-3-1-5-2-4. No. i is considerably proximad of the 

 others, as is the case with some existing salamanders. No. 3 is 

 separated from contact with the proximal elements, by the large 

 No. 2, which thus has the position of centrale carpi ^ but which 

 gives attachment to the second metacarpal. The subdiscoid No. 4 

 articulates with both astragalus and calcaneum, but most extensively 

 with the calcaneum. This tarsus is quite regular, and every bone 

 is in place. That of the opposite side is turned over on the leg, 

 and the astragalus is missing. 



The posterior digits are long and slender, and of various lengths, 

 although the metatarsals are of subequal length. The first and 



