CONTENTS. v 
Page 
Zoological Collection in the British Museum; On Pteronura 
Sanbachu, an Otter from Surinam, by Dr. J. E. Gray, F.R.S. &c.; 
Artificial Hybridization in the Genus Gossypium, by J. E. Bal- 
i, hs ey thu dv. bai etore ed 151—155 
Bkc.. NUMBER III. 
XXIII. On the new Bat (Amblyotus atratus) discovered by Prof. 
pe Dy ha Ey Terr TMes 2 ice eae ee ee 157 
XXIV. Observations on Sponges and on their Arrangement and 
Nomenclature. By Dr. J. E. Gray, F.R.S., V.P.Z.S., F.LS., &... 161 
 XXV. On Ardolytus prolifer. By Dr. R. Grerrr. (Plate VIIL) 173 
XXVI. Notule Lichenologice. No. XXI. By the Rev. W. A. 
LrieuTon, B.A., F.L.S.—Rev. E. Williams’s List of Shropshire 
re epee ee Se ee fey 183 
_ XXVIII. On the Spongie ciliate as Infusoria flagellata; or Obser- 
vations on the Structure, Animality, and Relationship of Lewcosolenia 
botryoides, Bowerbank. By H. James-Cuark, A.B., B.S., Professor 
of Natural History in the Agricultural College of Pennsylvania.... 188 
XXVIII. Observations on the Fur-Seals of the Antarctic Seas 
and the Cape of Good Hope, with the Description of a new Species. 
epee eed. CRAY, IRS. ViBiZ.50 0) hoi iii ela ec cece es 215 
mroceeuings of the Royal Society... 0.0... ccc es ee ee pecan’ 220 
Size of Foetus of the Pilot Dolphin, by Dr. J. E. Gray; Notice of a 
remarkable new Genus of Corals, probably typical of a new 
Family, by F. B. Meek; Note on the Polymorphism of the 
Anthozoa and the Structure of the Tubipore, by A. Kolliker ; 
On the Saliva and Salivary Organs of Doliwm galea and other 
Mollusca, by MM. 8S. de Luca and P. Panceri; On an Herma- 
cog a Nemertian (Borlasia hermaphroditica) from St. Malo, 
W. Keferstein; Anatomical Investigation of some Blind 
oleoptera, by M. C. Lespés; Action of the Induction-current 
upon Plants, by C. Blondeau; On the first Formation of the 
body in the Vertebrata, by Prof. His ......../......45. 224—231 
NUMBER IV. 
XXIX. On Lithodomous Annelids. By E. Ray LanxsEstTEr, 
Junior Student of Christ Church, Oxford. (Plate XI.) .......... 233 
XXX. On the Occurrence of the Genus Ptilograpsus in Britain ; 
with Notes on the Ludlow Graptolites. By Henry ALLEYNE 
rps DC, DE, BB. oo oa. cc inte ls Giee's ld Wed ds 238 
XXXL On the Geographical Distribution of the Balenide or 
Right Whales. By Dr. J. E. Gray, F.R.S., V.P.Z.8., F.LS., &e... 242 
XXXII. On a Variety of Spongilla Meyeni from the River Exe, 
Devonshire. By H: J. Canter, F.R.S. &e. «0.0.0. wee DAT 
