Hatha Yoga Pradeepika Ch-1, Po-4

refer:http://yog-knowledge.blogspot.com/2010/12/hatha-yoga-pradeepika-ch-1-po-4.html

Vîrâsana.

One foot is to be placed on the thigh of the opposite side; and so also the other foot on the opposite thigh as in figure below. This is called Vîrâsana.

Kurmâsana.

Placing the right ankle on the left side of anus, and the left ankle on the right side of it, makes what the Yogîs call Kûrma-âsana.

Kukkuṭa âsana.

Taking the posture of Padma-âsana and carrying the hands under the thighs. Raise yourself above the ground as in figure. This is Kukkuṭa-âsana.

Uttâna Kûrma-âsana.

Having assumed Kukkuṭa-âsana, when one grasps his neck by crossing his hands behind his head, and lies in this posture with his back touching the ground, it becomes Uttâna Kûrma-âsana, from its appearance like that of a tortoise.