. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Figure 6. Archaeoihyns f/orensis, postcranial skeletal elements. A, axis in lateral view, MCZ 4080; B, cervicals, in lateral and dorsal view, MCZ 4079; C, three dorsol vertebrae in lateral and anterior views, MCZ 4082; D, two posterior dor- sal vertebrae in lateral view, MCZ 4083; E, two fragmentary neural spines together with a rib and a caudal vertebra, MCZ 4083; F, first sacral vertebra with its ribs in anterior view, the articular surface of the right rib, and the anterior and lateral views of the right rib, MCZ 4
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Figure 6. Archaeoihyns f/orensis, postcranial skeletal elements. A, axis in lateral view, MCZ 4080; B, cervicals, in lateral and dorsal view, MCZ 4079; C, three dorsol vertebrae in lateral and anterior views, MCZ 4082; D, two posterior dor- sal vertebrae in lateral view, MCZ 4083; E, two fragmentary neural spines together with a rib and a caudal vertebra, MCZ 4083; F, first sacral vertebra with its ribs in anterior view, the articular surface of the right rib, and the anterior and lateral views of the right rib, MCZ 4080; G, presacral intercentrum in anterior, ventral, and posterior views, MCZ 4083; H, cervical, MCZ 4079, anterior, MCZ 4081, and posterior dorsal ribs, MCZ 4083. All X 1. Tlu' iK'ural .spines arc well developed. They are greatly expanded anteroposte- riorly to more than half the length of the centrum. Towards the top the spine ex- pands further, so that the ends are nearly in contact. The spines are typically narrow ti-ansversely. The spine is situated towards the back of the \ertebra, with the posterior margin in line with the posterior end of the centrum. The proportions of the neural spines \'ar\' in different areas of the verte- bral column. The spines on the anterior dorsals expand lateralb' towards the top as well as trans\erseK'. \\nien \ie\\ed from abo\e the spine looks barrel-shaped. The unfinished end of the spine in\ades the lateral surface, expanding the head e\en more at this point. More posteriorly along the column, the spines tend to become ])Iadelike structures. Towards the sacrum, the neural spines become shorter, yet their \\ idth remains the same. The nature of the iliac blade indicates tliat only two sacral ribs come in contact with it, as in ophiacodonts in general. The first sacral vertebra with its rib is preserved in block A (MCZ 40S0) (Fig. 6). The spine and the posterior zygapophyscs have been lost. The sacral rib is almost complete. The centrum is s
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Keywords: ., bookauthorharvarduniversity, bookcentury1900, booksubjectzoology
