416 ON A NEW SPECIES OF MACRAUCHENIA (M. BOLIVIENSIS) 
entire skeleton of Macrauchenia, but showing only these portions of 
one of the cervical vertebrae, been placed before an anatomist, he 
would have been as fully justified in predicting cannon-bones, bi- 
trochanterian femora, and astragalia with two, subequal scapho- 
cuboidal facets, as Cuvier was in reasoning from the inflected angle 
of the jaw to the marsupial bones of his famous Opossum. But, for 
all that, our hypothetical anatomist would have been wrong ; and, 
instead of finding what he sought, he would have learned a lesson 
of caution, of great service to his future progress. 
EXPLANATION OF PLATE VI. [PLATE 32.]. 
Fig. 1. Cervical vertebra of Macrauchenia Boliviensis, Huxley ; restored from the opposite- 
side, posteriorly. 
Fig. 1 a. The same vertebra, viewed from in front. 
Fig. 1 4. The same vertebra, viewed from behind, 
Fig. 2. Astragalus (left), from above. 
Fig. 2 a. 5 » from below. 
Fig. 2 6. 95 5, from the outer side. 
Fig. 3. Fragment of the occipital portion of the cranium, restored in outline. 
Fig. 3 a. The same fragment, viewed from without and laterally. 
Fig. 4. Part of the upper jaw and palate, and lateral view (a) of the crown of the most 
perfect tooth. 
g. 4a. Side-view of the large fragment of the matrix containing the teeth, with the smaller 
fragment, exhibiting the coronal impressions, adapted to it. 
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