Certain folks were exhibited in Sideshows as being on "four legs" although they were more than capable of sitting or 'standing' upright.

 
Ella Harper, the "Camel Girl" was born in 1873 and was in the show business from age 9 to 13.
 
Lucy Jones was known as the "Dog Girl" and exh in1894, age 13, at the Texas State fair.
 
Bob Huddleston as "Pony Boy" worked various carnivals and circuses for 36 years.
  
Alzoria Green, the "Turtle Girl" had 24 fingers and toes and was twice married.
 
Alice Bounds was born in Calcutta and exhibited with her Mom as "She-Bear" and "Mama Bear"
  
Baricassen was known as the "Elephant Man" and was from Algeria.
  
Henry Bulson worked the World Circus Sideshow at Coney Island as the "Spider Boy"
  
O N  A L L    F O U R S
Alzoria worked Dreamland Circus Sideshow , seasons 1930-33
Baricassen, "Greatest Curiosity of the 20th Century"
"Alice is 4' tall, has absent radius and ulnar, absent tibia and fibula, no patella, middle and terminal phalanges fused, webbing of hands and feet"
"Normal from waist up, his spiderly legs hung useless beneath" - Jeff Murray
"Ordinary walking was impossible but she could scuttle over the ground and run upstairs with wonderful speed."
Unidentified "dog-man" , taken in India I believe
A candid photo of Bob "Pony Boy" Huddleston with what looks like a "Seal Girl"
There is disagreement on whether or not this is Ho-Jo, the Bear Boy
Originally pub by me at Yahoo sideshow group as Message # 1730
Lucy Elvira Jones, Mannix says she was double-jointed and Monestier calls her Miss Violet