NEW OR LITTLE-KNOWN VERTEBRATES FROM THE 

 PERMIAN OF TEXAS. 



In 1880 Cope gave the first description and figure of the 

 scapula of Eryops.^ He had at the time only the lower portion of 

 the scapula with the co-ossified coracoid, bearing the cotylus for 

 the humerus. Later, in r888,^ he published a figure of the 

 shoulder-girdle with the clavicles and interclavicle in place. As 

 in the first specimen, the distal end of the scapula was missing, 

 but there was a small fragment of a distinct bone joining the 

 upper edge of the scapula, which he regarded as possibly a por- 

 tion of the scapula, but was uncertain as to its exact position. 

 In 1899, Broili^ described a skeleton of Eryops in which he 

 identified the fragment mentioned in Cope's description as the 

 epiclavicle or cleithrum. In 1898* the author mentioned the 

 presence of a cleithrum on the distal end of a scapula which 

 was regarded at the time as reptilian. The element is indicated 

 by a small fragment of the bone, which is attached by strong 

 rugose grooves and ridges to the scapula. The specimen (No. 76) 

 of the collection of the University of Chicago, probably belongs 

 in the genus Eryops, but to a species distinct from megacephaliis. 

 It is shown in Fig. i. It is the third scapula described below. 



In looking over the collection of the Chicago University I 

 find a nearly perfect scapula of Eryops (No. 182), with a com- 

 plete cleithrum in position. The bones have been badly broken, 

 but are little distorted and differ so much from the type species 

 that I refer them to a new species under the name Eryops latus. 

 The general outline of the bones is shown in Fig. 2. The scapula 

 differs from that of Eryops megacephaliis in the relatively greater 

 breadth of the coracoidal region and the straightness of the 

 antero-internal edge. The cleithrum is a queerly shaped bone ; 



"^Proc. Am. Phil. Soc, Vol. XIX, p. 51, 1880. 



^ Trans. Am. Phil. Soc, Vol. XVI, p. 362, 1888. 



=• Paleontographica, Vol. XLVI, p. 6i, 1899. 



^Am. Nat., Vol. XXXII, p. 70, 1898. 



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