Report on the zoological collections made in the Indo-Pacific Ocean ...

;682 JiXPLANATION OF THE PLATES.Fig. G. Reniern cribriformis. The most complete of the fragments,representing the type specimen, from the exterior. Inspirit. From Seychelle Islands, 12 fms. x |.H & H'. B. camerata. Two fragments, probably belongingto one (the typical) specimen. H shows the compact,even character which distinguishes the outer surfaceH' the chambered or plicate condition of the interior.In spirit. From Marie Louise Island, 16-17 fms. Nat.size.I. ClatJiria ma'andrina. Part of the type specimen, incrustinga stem. In spirit. From Marie Louise Island, Amirantes,17 fms. Nat. size.J. C. frondifera. The largest specimen obtained ; attached torock. ' It shows a transition from a flattened expanded(j) to a rounded trabecular (f)form of the constituentlobes of sponge-substance, and exhibitsmore definitenessof form as a whole than is usual in the species. Dry.From Providence Ileef, 24 fms. Nat. size.K. C. decumbens. The type specimen, showing considerablevariation in the proportionate amount of fenestration tothe surface (e. g. at h the surface is entire, at Ic' it is regularlyfenestrate) ; at h" the surface is abraded. In spirit.From Etoile Island, 13 fms. Nat. size.L. Leucortis anguinea. The type specimen, in spirit. FromProvidence Eeef, 24 fms. x 2. Z, stem.M. Erylus cylindrigerus. The type specimen, in spirit. FromProvidence Eeef.Nat. size.N*. Pliyllospongia onadagascarcnsis, var. supraoculata. FromAfrican Island. Dry. N'. The same, upper margin ofmedian lobe, from above, to show thickness of frond andcharacters of vents.Nat. size.* By an inadvertence these figures h".. 3 been referred to in tlie text (p. 504)as M and M'