XXVII. SOME SPONGES PARASITIC ON CLIONIDAE WITH FURTHER NOTES ON THAT FAMILY. By N. Annandale, D.Sc, F.A.S.B., Superintendent, Indian Museum. (Plate XXXIV.) In a recent paper on the Clionidae of Indian seas {Rec. Ind. Mus. XI, pp. 1-24) I referred incidentally to other sponges parasitic in their burrows. I now propose to give an account of these sponges adding some additional notes on the Indian Clionidae. The systematic position of the different species may be con-sidered first, in taxonomic order, and then their biological rela-tionships. Part I.— SYSTEMATIC. The following is a list of the species to be considered ; all belong to the order Tetraxonida. Grade TETRAXONELLIDA. Family PACHASTRELLIDAE. Family STELLETTIDAE. Stoeba plicata var. simplex (Carter). Stelletta vestigium, Dendy. Grade MONAXONELLIDA. Family EPIPOLASIDAE. Family DESMACIODONIDAE.. Coppatias penetrans (Carter). Subfamily ECTYONINAE. Coppatias investigairix, sp. nov. Rhahdevemia prolifera, sp. nov. Family AXINELUDAE. Family CLIONIDAE. Amorphinopsis excavans, Carter. Cliona carpenteri, Hancock. A. e. var. digitifera, nov Cliona mucronata, Sollas. Family CHONDROSIIDAE. Cliona quadrata, Hancock. Chondrilla nucula, Schmidt. Cliona kenipi , sp. nov. Chondrilla mixta, Schulze. Thoosa hancocci, Topsent. Chondrilla distincta, Schulze.
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