Maha Vishnu

Here is a list of all 18 chapters in the Manvantara-khanda of the Vishnu Purana:

1. Manvantara-samhita
2. Svayambhuva-manvantara-samhita
3. Svarocisha-manvantara-samhita
4. Vaivasvata-manvantara-samhita
5. Chakshusha-manvantara-samhita
6. Vaivasvata-manvantara-samhita (contd.)
7. Savarni-manvantara-samhita
8. Daksha-manvantara-samhita
9. Brahma-samhita
10. Prajapati-samhita
11. Indra-samhita
12. Surya-samhita
13. Chandra-samhita
14. Brihaspati-samhita
15. Vishnu-samhita
16. Rudra-samhita
17. Bhairava-samhita
18. Shakti-samhita

The Manvantara-khanda is the third part of the Vishnu Purana, and it describes the different Manvantaras, or cycles of creation and destruction. It also contains stories about the different Manus, or progenitors of humanity, and their descendants.

I hope this helps! Let me know if you have any other questions.