SB 2.10.47
parimanam ca kalasya
kalpa-laksana-vigraham
yatha purastad vyakhyasye
padmam kalpam atho srnu
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
O King, I shall in due course explain the measurement of time in its gross and subtle features with the specific symptoms of each, but for the present let me explain unto you the Padma-kalpa.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
The present duration of a kalpa of Brahma is called the Varaha-kalpa or Svetavaraha-kalpa because the incarnation of the Lord as Varaha took place during the creation of Brahma, who was born on the lotus coming out of the abdomen of Visnu. Therefore this Varaha-kalpa is also called Padma-kalpa, and this is testified by acaryas like Jiva Gosvami as well as Visvanatha Cakravarti Thakura in pursuance of the first commentator, Svami Sridhara. So there is no contradiction between the Varaha and the Padma-kalpa of Brahma.