. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Figure 6. Protorothyris archeri. Postcranial elements. A, B, C, and D, various views of shoulder girdle, MCZ 2148. E and F, restoration of shoulder girdle in medial and lateral v\ews. G, obliquely anterodorsal view of the scapulocoracoid showing position of foramina on medial surface. H, anterior view of left clavicle. I, ventral view of distal end of humerus, ulna, and radius, MCZ 2150. J, dorsal, ventral, anterior, posterior, and proximal views of femur, MCZ 2150. X1^2- chondral shoulder girdle. Most, if not all, of
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Figure 6. Protorothyris archeri. Postcranial elements. A, B, C, and D, various views of shoulder girdle, MCZ 2148. E and F, restoration of shoulder girdle in medial and lateral v\ews. G, obliquely anterodorsal view of the scapulocoracoid showing position of foramina on medial surface. H, anterior view of left clavicle. I, ventral view of distal end of humerus, ulna, and radius, MCZ 2150. J, dorsal, ventral, anterior, posterior, and proximal views of femur, MCZ 2150. X1^2- chondral shoulder girdle. Most, if not all, of the ribs in the trunk region are incomplete distally. The pattern shown in the skeletal restoration is based on the maximum length of the ribs presented. No ribs are present between the eighteenth trunk vertebra and the sacrum. The pattern of the sacral ribs is e\'idently similar to that described in Paleothyris, although the preservation here is too poor for further elaboration. No cau- dal ribs are preserved. The shoulder girdle is superblv shown in the type and MCZ 2149 (Figs. 5 and 6). It does not differ substantiallv from that of Paleothyris, but some details are more clearly shown. The cleithrum is a simple, compressed rod of bone fitting into a well- defined groove at the anterolateral margin. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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