xvi CLASSIFIED SUMMARY OF THE CONTENTS OF VOLS. I-VI. 



PORIFERA. 



HEXACTINELLIDA . . . By R. KIRKPATRICK . Vol. III. 



TETRAXONIDA . . . By R. KIRKPATRICK I\ 7 . 



CALCAREA . . . . By C. F. JENKIN, B.A IV. 



BOTANY. 



MUSCI. 

 By JULES CARDOT . . . . III. 



MARINE ALGJL 



AND FLORIDE^E By A. and E. S. GEPP . III. 



CORALLINACE^; . . By M. FOSLIE ... ,, III. 



FRESHWATER ALG.E. 

 By F. E. FRITSCH, D.Sc., PH.D., F.L.S. . ,. VI. 



LICHENES. 

 By DR. OTTO VERNON DARBISHIRE . . ,, V. 



GEOLOGY AND MINERALOGY. 



FIELD-GEOLOGY . . . By H. T. FERRAR, M.A., F.G.S. . I. 



ROCK-SPECIMENS. . . By G. T. PRIOR, M. A., D.Sc., F.G.S. . I. 



