When two Sarpasirsa hands have their tips stretched obliquely with the thumbs touching middle fingers it is remembered as Sūcīmukha.
Sūcīmukha—The two Sarpaśiraḥ hands with their thumbs touching middle fingers are to stretch their tips obliquely.
When the two Sarpa-sira hands, with their heads spread obliquely are in the pose of Svastika, they should be known as Sūcī-mukha.
(there is no Sarpasirsa in this text)
The midfinger and thumb of two sarpaṡīrsha hastas [are joined together and move across] the forefingers (stretched) outward to give sūcī (mukha).
When the thumbs and the middle-fingers of sarpasirsa hands are joined near the caturasra region [eight fingers away from the chest] with the forefingers extended, it is known as sūcīmukha.
Or, some say that thumbs of sarpasirsa hands are stretched out in the middle and moved in svastika, [i.e., crossed]. Or, some [again] say that after moving the hands first in patāka inwards and outwards, the forefingers are extended [in the sucimukha hand-ges-ture]. This is sūcīmukha.