iv CONTENTS. 
XII. Notes on the Thysanura.—Part IV. By Sir Joux LUBBOCK, Bart., F.R.S., V.P. 
Em. S00, ye. i : . . page 277 
XIII. On the Anatomy of the Genus a with the pom ofa new Form. 
By EbwarD L. Moss, M.D., Assistant- ee R.N., H.M.S. Simoom. Commu- 
nicated by Professor HUXLEY, F.L.S. UO ; 2. 0 m 
PART III.—1871. 
XIV. Observations on the Lichens collected by Dr. RoBERT Brown, M.A., F.R.G.S., 
in West Greenland in 1867. XE W. Lauper Linpsay, M.D., F.R.S.E., 
BER, a: vo 1 NN 
XV. On the Vertebrate Skeleton. By ST. GEORGE MIVART, F.R.S., PDS. . . 369 
XVI. Descriptions of some British Spiders new to science ; with a Notice of others, of 
which some are now for the first time recorded as British species. By the Rev. 
O. P. CAMBRIDGE. Communicated by JAMES SALTER, Esq., F.R.S., F.L.S. . 393 
PART IV.—1871. 
XVIT. Notes on the Reptiles, Amphibia, Fishes, Mollusca, and Crustacea obtained during 
the voyage of H.M.S. ‘Nassau’ in the years 1866-69. By RoBERT O. Cun- 
NINGHAM, M.D., F.L.S., C.M.Z.S., v dc m Natural June us Queen's Col- 
lege, Belfast . .: .. . 465 
XVIIL Revision of the genus Cassia. By GEORGE BENTHAM, P FRS, PDS: 508 
XIX. Contributions to the Natural History of the Passifloraceæ. M. T. Masters, 
MD) ERNs LaS GO o he SINN POE wart, ONE 
