EXPLANATION OF PLATE IX. 
Amorphinopsis excavans vai. robinsonii, var. nov. 
Fig. I. — Thick hand-section of the outer parts (x ii), showing the spicule- 
fibres, the external layer of small macroscleres and the wide hori- 
zontal channels. 
Spongilla inarmata, sp. nov. 
Fig. 2. — Gemmule in its cage of skeleton-spicules, x 75. 
Spongilla conifera, Annandale. 
Fig. 3.— Part of the skeleton of a sponge as seen from above, magnified. 
Fig. 4.— Lateral view of a gemmule, x 112. 
Fig. 5. — Oblique section of a gemmule, x 112. Somewhat diagramatic. 
Trochospongilla sol, sp. nov. 
Fig. 6. — Gemmules as seen from above, x 75. 
PLATE II. 
(This plate was issued with part I of the present volume in December, 1916.) 
Amorphinopsis excavans var. robinsonii, var. nov. 
Fig. 3. — A schizotype from Port Weld, showing lacunae in the sponge over the 
mouths of the burrows of boring molluscs. Nat. Size. 
Spongilla lacustris, auct. 
Fig. 4. — A fragment from Pak Payum on the Tale Sap. Nat. Size. 
Spongilla potamolepis, sp. nov. 
Fig. 5.— T^^pe-specimen from Lampam on the Tale Sap. Somewhat reduced. 
