6. Indo-Gangetic Plain.
(From Sind to the Brahmaputra.)
Sponges:—
1. Spongilla (Euspongilla) lacustris subsp. reticulata (Gangetic delta).
2. Spongilla (Euspongilla) proliferensʘ (Lower Bengal, etc.).
3. Spongilla (Euspongilla) alba✻ (Lower Bengal).
4. Spongilla (Euspongilla) crateriformis†§.
5. Spongilla (Eunapius) carteri†ʘ (Lower Bengal, etc.).
6. Spongilla (Eunapius) fragilis subsp. calcuttana* (Lower Bengal).
7. Spongilla (Eunapius) crassissima (Bengal).