CONTENTS. V 



Page 



XIX. Descriptions of new Species of Butterflies from Tropical 

 America. By Osbert Salvin, M.A., F.L.S., &c 163 



XX. On a new Labyi'inthodont Amphibian from the Northumber- 

 land Coal-field, and on the Occurrence in the same locality of 

 Anthracosau7-us Russelli. By Albany Hancock, F.L.S,, and Thos. 

 Atthey 182 



XXI. On Grayella cyathophora, a new Genus and Species of 

 Sponges. By H. J. Cabteb, F.R.S. &c. (Plate VII.) 189 



XXII. Notul* Lichenolo^icEe. No. XXX. By the Rev. W. A. 

 Leighton, B.A., F.L.S. — Further Notes on the Lichens of Cader 

 Idris, North Wales 198 



XXIII. Descriptions of three new Species of Callidryas. By 

 Arthur G. Butler, F.L.S 202 



XXIV. Descriptions of some new Species of Lamiidcs. By 

 Francis P. Pascoe, F.L.S. &c 203 



On the Marine Forms of Crustacea which inhabit the Fresh Waters 

 of Southern Europe, by Prof. Heller ; On the Leaves of Coni- 

 ferae, by Thomas Meehan, of Germantown, Pennsylvania ; Me- 

 chanical Reproduction of the Flight of Insects, by M. Marey ; 

 Spectroscopic Examination of the Diatomacese, by H. L. Smith ; 

 On two new Generic Types of the Families Saprolegniece and 

 Peronosporece, by MM. E. Roze and M. Cornu ; On Spatangus 

 RascM, Lov^n 211—220 



NUMBER XXII. 



XXV. On some curious Fossil Fungi from the Black Shale of the 

 Northumberland Coal-field. By Albany Hancock, F.L.S., and 

 Thos. Atthey. (Plates IX. & X.) 221 



XXVI. Descriptions of a new Genus and two new Species of 

 Scyllaridce and a new Species of jEthra from North America. By 

 Sidney I. Smith 228 



XXVn. On some new Species of Graptolites. By Henby 

 Alleyne Nicholson, M.D., D.Sc, M.A., F.G.S. (Plate XI.) . . 231 



XXVIII. Descriptions of four new Species of Diurnal Lepidoptera 



of the Genus Thyca. By A. G. Butler, F.L.S. &c 242 



XXIX. The Myology of Cyclothtints didactylus. By John Charles 

 Galton, M.A., F.L.S., Lectm-er on Comparative Anatomy at 

 Charing Cross Hospital. (Plate VIH.) 244 



XXX. Additional Notes on Sea-Bears. By Dr. J. E. Gray, 

 F.R.S. &c 264 



