CONTENTS OF NUMBER 48.—Fifth § 
XL. On some Arctic Horenariioe from. Soundines ob a 
Austro-Hungarian North-Polar Expedition of 1872 
Henry B. Brapy, F.R.S. (Plate KXI.) ..... 
XULI. On certain Points in the Morphology of. the Blastoic es 
P. HErsert CaRPENTER, M.A., Assistant Master at Eton 
XLIT. On the Genera Ctenoptychius, Agassiz ; Ctenopetalus Ap 
and Harpacodus, Agassiz. By Jamus W. Davis, FG. 8. 
XLII. The Organization of Ceemogoncume, a Theory 
By Dr. J. Mitrzr 
XLIV. Report on a Collection. made by Mr. T. Cone in 
Island. By Dr. A. Ginruer, BE. A. Suirn, E. J. ae C 
HOUSE, F. J. Bett, and 8. O. Riprey 
seecett ee sete ew es 
XLV. Description of a new Species of the Genus Archa : 
St. Helena. By F. Jurrrry Bert, M.A. 
cco eee ee ee te oe 
XLVI. Description of two new: Species of Shells. By 3 
SMEDEY oS Uiterace 
ee er ry 
BIBLIOGRAPHICAL NOTICE. 
The Formation of Vegetable Mould through the Action GE i 
with Observations on their Habits. By CHARLES Darwin, I 
¥.BS. 
bh Reh dn Sena Leas yh ek RANE Ra SLCC We IU BRC Wr PO ee ysis ae =k 
MISCELLANEOUS. 
Dutch Mollusca. By J. Gwyn JEEFREYS, LL.D: RS 
An Abbreviated Rae ey in ue hetrachli, 
* Packarp, Jun 
By Ore Baer we ene OSes! ee) ei a isle vee! (s, tee) sy a eae 
Observations on the Rotifera of fie Cone ea ‘By Megs 
Addendum to our Knowledge of the Carnosa.. es He 
PRS. Ge... 
Jurassic Birds and their Allies. By Prof, on ( 
Contributions to the Natural History of the Compomn Ase dia ft 
Bay of Naples. By Dr. A. Dutta Vane .......... 
On the Vitality of the Germs of Artemia salina and Hae : 
lateritia. By M. A. Cunrzs 
The Tertiary Lake-basin of Florissant, Colorado. By 8. a, Se 
On the Nature of Cyathophycus. By C. D. Waxcorr 
ce eee 
*," It is requested that all Communications for this Work ‘ma , 
post-paid, to the Care of Messrs. Taylor and Francis, P 
Red Lion Court, Fleet Street, London, ‘ 
