what is the name of that type of antelope that has a nose that looks like an elephants trunk?

Answer 1

There is the tapirs, which have a short prehensile trunk as several people have already mentioned, but they are not related to antelopes. They are actually closer to horses and rhinos (the 'odd-toed ungulates')

There is a type of antelope, called the saiga (Saiga tartarica), which has something akin to a trunk.

Here's some pictures
http://www.ultimateungulate.com/Artiodactyla/Saiga_tatarica.html
http://donsmaps.com/images/saiga.jpg
http://www.iucnredlist.org/info/images/oldgallery/saiga.png
http://www.cites.org/esp/gallery/species/mammal/saiga.html

Perhaps that's the critter you're looking for?

The enlarged rostrum is an adaptation for warming and moistening the cold, dry air the saiga breathes in its native habitat on the cold plains of northern China and Kazakhstan.

They used to be found in North America as well, during the ice ages of the Pleistocene.

Answer 2

The Saiga (Saiga tatarica) is a antelope which inhabits a vast area between Kalmykia, Kazakhstan, southern Siberia, and northwestern China. The Saiga typically stands 0.6-0.8 metres at the shoulder and weighs between 36 and 63 kg. Their lifespan ranges from 6 to 10 years. Males are bigger than females and are the only sex to carry horns. The horns have some value as Chinese traditional medicine and for that reason Saiga are now endangered by poaching.

Saigas form very large herds that graze in semi-desert steppes eating several species of plants, including some that are poisonous to other animals. They can cover considerable distances and swim across rivers.

The mating season starts in November, when stags fight for the possession of females. The winner leads a herd of 5-50 females. In springtime the mother gives birth to a sole, or less frequently, two foals. Female saiga, like the dikdik, are noted for their ability to bear young at the early age of just eight months.

The Saiga is recognisable by an extremely unusual, over-sized, and flexible, nose structure. The nose warms the air in winter and filters out the dust in summer.

Cherny Zemli Nature Reserve was created in Russia's Kalmykia Republic in 1990s to protect the local saiga population.

100 % sure.

Answer 3

A tapir? They're not really antelope-like, but this might be what you mean...

http://en.wikipedia.org/wiki/Tapir

Answer 4

Is it the saiga you are thinking of?

http://www.cites.org/esp/gallery/species/mammal/saiga.html

Answer 5

I think you are talking about a Tapir.