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XIX. Report on the Pelagic Hemiptera, 3_s._ 6_d._ XX. Report on the Hydroida (first part). Plumularidæ, 9_s._ XXI. Report on the Specimens of the Genus Orbitolites, 4_s._

Volume VIII. Zoology. 40_s._ Or

XXIV. Reports on the Calcarea, 6_s._ XXV. Report on the Cerripedia, Systematic Part, 10_s._

PHYSICS AND CHEMISTRY. Volume I. 21_s._ Or