CONTENTS. V 



Page 



XIX. Descriptions of new Species of Butterflies from Tropical 



America. By Osbekt Sai-vin, M.A., F.L.S., &c 103 



XX. On a new Labyrintliodont Amphibian from the Northumber- 

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

 Anthraeosawus Russelli. By Albany Hancock, F.L.S., and Thos. 

 Atthey 182 



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

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



XXII. Notidse Lichenologicse. No. XXX, By the Eev. W. A. 

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

 Idi-is, North Wales 198 



XXin. Descriptions of three new Species of CaUidryas. By 

 Arthur G. Butler, F.L.S 202 



XXIV. Descriptions of some new Species of Lamiidce. 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- 

 fers, by Thomas Meehan, of German town, Pennsylvania ; Me- 

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

 Spectroscopic E.\;amination of the Diatomacefe, by H. L. Smith ; 

 On two new Generic Types of the Families Saproleyniece and 

 Peroiwsporea, by MM. E. Roze and M. Cornu ; On Spatanyus 

 Raschi, Loven 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 



XXVII. On some new Species of Graptolites. By Henry 

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



XXVni. 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 Cyclothurus didactylus. By John Charles 

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

 Charing Cross Hospital. (Plate VIII.) 244 



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

 F.R.S. &c -^tj^ 



