The quarters should be broad and fleshy in correspondence with the
sides and chest, and if they are also firm and solid throughout they
will be all the lighter for the racecourse, and will render the horse
in every way more fleet.

To come to the thighs (and buttocks):[27] if the horse have these
separated by a broad line of demarcation[28] he will be able to plant
his hind-legs under him with a good gap between;[29] and in so doing
will assume a posture[30] and a gait in action at once prouder and
more firmly balanced, and in every way appear to the best advantage.

[27] Lit. "the thighs beneath the tail."

[28] Reading {plateia to gramme diorismenous ekhe}, sc. the perineum.
Al. Courier (after Apsyrtus), op. cit. p. 14, {plateis te kai me
diestrammenous}, "broad and not turned outwards."

[29] Or, "he will be sure to spread well behind," etc.

[30] {ton upobasin}, tech. of the crouching posture assumed by the
horse for mounting or "in doing the demi-passade" (so Morgan, op.
cit. p. 126).

The human subject would seem to point to this conclusion. When a man
wants to lift anything from off the ground he essays to do so by
bringing the legs apart and not by bringing them together.

A horse ought not to have large testicles, though that is not a point
to be determined in the colt.