276 Review of Saporta’s Work 
New Mexico near Trinidad are still more intimately related by — 
a preponderance of Palms, of Ferns of true Kocene character, 
able, in their lower part at least, to the Eocene. His cele- 
brated work (Les Etudes), on the vegetation of the Tertiary 
in the southwest of France, especially considers the fosst 
remains of that formation. They were discovered, in a very 
good state of preservation, along the borders of what was once 
an Eocene lake, whose duration was continued through the 
Oligocene to the lower Miocene, or Aquitanian. The genera 
characters of this formation are remarkably similar to those of 
a 
ble to many genera, one of which, Zebias, still inhabits fresh 
water in Sardinia and Northern Africa. Evyeu insects were 
illed in immense numbers; small and scarcely perceptible 
flies, mosquitoes, butterflies, libellules, winged ants, bees, gave 
there to the winds their delicate remains, to be strewn along 
the shores and buried in the deposit that was soon to be hard- 
ened, some of the specimens still preserving traces of their col- 
