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( )n /door Sporting Specialties 
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L. L. Bean, Inc. 
782 Casco St., Freeport, ME 04033 
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Handguide to the 
CORAL REEF 
FISHES... 
Makes Your Visit to the Caribbean 
More Fun than Ever 
• More than twice as many species (460) as 
any other guide 
• Organized for easier, faster, more accurate 
identification 
• Remarkably accurate full color 
illustrations in natural habitat 
• Covers all Caribbean waters as well as 
Florida, Bermuda and the Bahamas 
• Crammed full of 
interesting information 
• Includes 50 common corals and 
invertebrates \ 
• Great gift idea for snorklers, 
sportdivers, hobbyists, and 
vacationers 
Vfft 
SEND CHECK FOR $9.95 TO: 
ACADEMY OF NATURAL SCIENCES 
Publications Department — Fish Guide 
19th and the Parkway • PHILA., PA 19103 USA 
PA. residents add 60c copy sales tax. 
JAt ikangcoie. m hurd ia. roodxx^ 
-ponLon 
placental mammals have, ever come up 
with an imitation monkey like Dixon’s 
“baraboo” when they’ve had no trouble 
evolving imitation dogs, moles, wood- 
chucks, and flying squirrels? 
One answer might be to point to the 
important role of chance in evolution. 
Maybe there aren’t any giant rabbits 
because there just don’t happen to be 
any giant rabbits, and no more need be 
said. But I suspect that there is more to 
it than that, and that we simply don’t yet 
understand the reasons why evolution 
has missed so many apparently good 
bets. Some important facts about ecol- 
ogy, genetics, or the general principles 
of evolutionary change may be escaping 
us because we are busy trying to figure 
out why we have the animals we have, 
not why some animals can’t get into the 
world. Maybe there are genetic or em- 
bryological reasons that prohibit 
marsupials from having big brains or 
mammals in general from having a 
dozen cervical vertebrae. Maybe there 
are fundamental ecological reasons for 
the absence of rabbucks. Perhaps there 
is some global truth about primate loco- 
motion that explains why no monkeys 
ever took to the air. If so, then we need 
to start thinking seriously about the zo- 
ology of imaginary animals, and After 
Man is a good enough place to start. 
Unfortunately, most of Dixon’s ani- 
mals aren’t very instructive. They don’t 
exist because they’re anatomically, eco- 
logically, or evolutionarily absurd. Take 
the purrip bat, for instance. Not only is it 
eyeless (a favorite assumption of Dix- 
on’s, even for tree dwellers and open- 
country predators), but it has its ears 
shoved forward to the tip of its snout, a 
move guaranteed to eliminate the phase 
differences between right and left ears 
needed for echolocation. Presumably it 
runs into things a lot. The lost carnivores 
In 1974 we originated our epoch-making 
Galapagos Islands Thrill Cruises, which lor 
several years enabled many hundreds of 
budget-minded travelers who were interest- 
ed in ecology, wildlife and photography to 
see these unique islands without luxurious 
trimmings but under expert guidance 
We now again oiler a budget program 
which includes some of the highlights 
which make a visit to this remarkable archi- 
pelago such a renowned tourist attraction 
We explore five of the islands in order to 
view sea lions, iguanas and a large variety 
of birds, such as the famous Darwin's 
finches, boobies, frigates and gulls: 
Galapagos Islands 
Thrift Program 
APRIL 4 TO 14, 1982 
JUNE 27 TO JULY 7. 1982 
DECEMBER 26 TO JANUARY 5, 1983 
Our program includes easy hikes on Santa 
Cruz to see tortoises roaming free and to 
the top of the dormant volcano at Sullivan 
Bay. and ample opportunities for swim- 
ming and snorkeling. It is ideal for young 
people and families with children and has 
been planned during periods of school and 
college vacations 
We do not claim that these programs are as 
comprehensive as our superb and unrivalled 
Discover Galapagos yacht cruises in Au- 
gust and October. 1982; but our meticu- 
lously supervised arrangements do provide 
you with a fascinating introduction to 
these wonderful islands— and at a third of 
the cost. 
Each program is accompanied by one of 
our expert leaders and a naturalist guide 
who give informative talks and lead us in 
the field. 
Before the week at the islands, we spend 
two days at the best hotel in Quito, Ecua- 
dor's lovely capital in the Andes 
Please send for the detailed brochure of 
these programs— we also specialize in ex- 
peditions to Greenland, Mount Kilimaniaro. 
the Himalayas and the Andes: wildlife 
safaris to see polar bears and seals in nor- 
thern Canada and to Scotland. Borneo and 
Raiasthan; and archaeological tours to 
Peru. Morocco and Eqypt 
HANNS EBENSTEN TRAVEL, INC 
705 WASHINGTON STREET, NEW YORK, NY 10014 
TELEPHONE 12121 <>91 7429 
— 
BUSHNELL 7x35 CUSTOM 
Mfg. List $280.00 Postpaid $164.00 
This is an example of the deep discount prices on high quality 
optics that is found in our FREE catalog. This catalog lists 
and illustrates an outstanding selection ot telescopes, binoc- 
ulars etc., plus valuable information on how to properly select 
them Write for it today. 
GIL HEBARD OPTICS 
COURTHOUSE SQ., KNOXVILLE, ILL. 61448 
86 
