CONTENTS. V 



Page 

 Zoological Collection in the British Museum ; On Pterontira 

 Satibachii, an Otter from Surinam, by Dr. J. E. Gray, F.R.S. &c. ; 

 Artificial Hybridization in the Genus Gossypium, by J. E. Bal- 



NUMBER III. 



XXIII. On the new Bat {Amhlyotm atratus) discovered by Prof. 

 Kolenati. By L. H, Jeitteles 157 



XXIV. Observations on Sponges and on their Arrangement and 

 Nomenclature. By Dr. J. E. Gray, F.R.S., V.P.Z.S., F.L.S., &c. . . 161 



XXV. On Autohjtus prolifer. By Dr. R. Greepf. (Plate VUI.) 173 



XXVI. NotulEe Lichenologicje. No. XXI. By the Rev. W. A. 

 Leighton, B.A., F.L.S. — Rev. E. Williams's List of Shropshire 

 Lichens 183 



XXVII. On the Spongics ciliatce as Infusoria Jlagellata ; or Obser- 

 vations on the Structiu-e, Animality, and "Relationship of Leucosolenia 

 botryuides, Bowerbank. By H. James-Clark, 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. 



By Dr. J. E. Gray, F.R.g., V.P.Z.S 215 



Proceedings of the Royal Society 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 TuhipwcB, by A. Kolliker ; 

 On the Saliva and Salivary Organs of Dolium galea and other 

 Mollusca, by MM. S. de Luca and P. Panceri ; On an Hei-ma- 

 phrodite Nemertian (Borlasia herrnaphroditica) from St. Malo, 

 by W. Keferstein; Anatomical Investigation of some Blind 

 Coleoptera, by M. C. Lespes ; Action of the Induction-current 

 upon Plants, by C. Blondeau ; On the first Formation of the 

 body in the Vertebrata, by Prof. His 224—231 



NTOIBER IV. 



XXIX. On Lithodomous Annelids. By E. Ray Lankester, 

 Junior Student of Christ Church, Oxford. (Plate XI.) 238 



XXX. On the OccmTence of the Genus Ptilograpsus in Britain ; 

 with Notes on the Ludlow Graptolites. By Henry Alleyne 

 Nicholson, D.Sc, M.B., F.G.S 238 



XXXI. On the Geographical Distribution of the Halcsnidcs or 

 Right Whales. By Dr. J. E. Gray, F.R.S., V.P.Z.S., F.L.S., &c. . . 242 



XXXII. On a Variety of Sponqilla Meyeni from the River Exe. 

 Devonshire. By H. J. Carter, F.R.S. &c '. 247 



