Page 208 - The Transitional Form Dilemma

THE TRANSITIONAL-FORM DILEMMA

355 to 295-mil-
lion-year-old spi-
der fossils,
right, and a
present-day
spider

Above, a roughly
135-million-year- Below, a crab fossil approxi-
old Echinoderm mately 55 to 35 millions year old,
(starfish) fossil, and , and a present-day crab
a living specimen

Above, an ap-
proximately 300-
million-year-old water
scorpion fossil from the Later Below, an approximately 210-
Carboniferous Period, and million-year-old boned fish fos-
sil, and a present-day specimen
a present-day specimen

Left, a 300-million-
year-old Trionyx (tor-
toise) fossil, and a
present-day tortoise

206