xii THE VOYAGE OF H.M.S. CHALLENGER. 



MEMOIRS IN PROGRESS. 



(The years in which it is expected the Eepoits will be issued from the Press are in 

 some instances stated after the names of the Reports.) 



Eeport on the Foraminifera (in 1883). 



By H. B. Brady, r.E.S., F.L.S., F.G.S. 



Eeport on the Composition of Ocean Waters (in 1883). 

 By Professor W. Dittmar, F.P.SS. L. and E. 



Eeport on the Specific Gravity Observations (in 1883). 

 By J. Y. Buchanan, M.A., F.E.S.E. 



Eeport on the Copepoda (in 1883). 



By G. Stewardson Brady, M.D., F.E.S., F.L.S. 



Eeport on the MYZosTOMiDyE (in 1883). 

 By Professor Ludwig von Graff. 



Eeport on the Cirripedia (in 1883). 



By P. P. C. HoEK, Assist. Zoot. Lab. Leiden. 



Eeport on the Polyzoa (in 1883). 



By George Busk, F.E.S., F.P.L.S., F.G.S., F.E.C.S. 



Eeport on the Calctspongi^ (in 1883). 

 By N. Polejaeff. 



Eeport on Human Crania (in 1883). 



By Professor William Turner, M.B., F.E.SS., L. & E. 



Eeport on the Actiniaria (Supplementary Memoir) (in 1883). 

 By Professor Eichard Hertwig. 



Eeport on the Chitonid^. 



By Professor A. C. Haddon, M.A., F.Z.S. 



Eeport on the Tunicata. Second Part (in 1884). 



By Professor W. A. Herdman, D.Sc, F.E.S.E., F.L.S. 



Eeport on Diatomace.e (in 1884). 



By Conte Abate Francesco Castracane Degli Antelminf.lli. 



