Natyashastra
एककं चतुरस्रं वाप्युपवर्तनमेव च । उत(उप)पातः प्रवेणी च द्व्यङ्गं संहरणं तथा ॥ १९५॥
And there is the Ekaka, Caturasra, and also Upavartana. Upapāta and Praveṇī are two-limbed, and Saṃharaṇa is likewise.
english translation
ekakaM caturasraM vApyupavartanameva ca । uta(upa)pAtaH praveNI ca dvyaGgaM saMharaNaM tathA ॥ 195॥
hk transliteration by Sanscript